diff --git a/go.mod b/go.mod
index 2e3ea597..0e6783c0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,7 @@
 module github.com/obalunenko/advent-of-code
 
 go 1.21
-toolchain go1.22.0
+toolchain go1.22.2
 
 require (
 	github.com/briandowns/spinner v1.23.0
@@ -11,19 +11,19 @@ require (
 	github.com/obalunenko/version v1.2.0
 	github.com/savioxavier/termlink v1.3.0
 	github.com/stretchr/testify v1.9.0
-	github.com/urfave/cli/v2 v2.27.1
+	github.com/urfave/cli/v2 v2.27.2
 )
 
 require (
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fatih/color v1.13.0 // indirect
 	github.com/mattn/go-colorable v0.1.9 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 // indirect
 	golang.org/x/exp v0.0.0-20240213143201-ec583247a57a // indirect
 	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/term v0.6.0 // indirect
diff --git a/go.sum b/go.sum
index 8c86f7d8..323f81f7 100644
--- a/go.sum
+++ b/go.sum
@@ -6,8 +6,8 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e h1:fY5BOSpyZCqRo5O
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 h1:q763qf9huN11kDQavWsoZXJNW3xEE4JJyHa5Q25/sd8=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
-github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
@@ -33,10 +33,10 @@ github.com/savioxavier/termlink v1.3.0 h1:3Gl4FzQjUyiHzmoEDfmWEhgIwDiJY4poOQHP+k
 github.com/savioxavier/termlink v1.3.0/go.mod h1:5T5ePUlWbxCHIwyF8/Ez1qufOoGM89RCg9NvG+3G3gc=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/urfave/cli/v2 v2.27.1 h1:8xSQ6szndafKVRmfyeUMxkNUJQMjL1F2zmsZ+qHpfho=
-github.com/urfave/cli/v2 v2.27.1/go.mod h1:8qnjx1vcq5s2/wpsqoZFndg2CE5tNFyrTvS6SinrnYQ=
-github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
-github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
+github.com/urfave/cli/v2 v2.27.2 h1:6e0H+AkS+zDckwPCUrZkKX38mRaau4nL2uipkJpbkcI=
+github.com/urfave/cli/v2 v2.27.2/go.mod h1:g0+79LmHHATl7DAcHO99smiR/T7uGLw84w8Y42x+4eM=
+github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 h1:+qGGcbkzsfDQNPPe9UDgpxAWQrhbbBXOYJFQDq/dtJw=
+github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913/go.mod h1:4aEEwZQutDLsQv2Deui4iYQ6DWTxR14g6m8Wv88+Xqk=
 golang.org/x/exp v0.0.0-20240213143201-ec583247a57a h1:HinSgX1tJRX3KsL//Gxynpw5CTOAIPhgL4W8PNiIpVE=
 golang.org/x/exp v0.0.0-20240213143201-ec583247a57a/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
 golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
diff --git a/vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go b/vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go
index b4800567..42bf32aa 100644
--- a/vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go
+++ b/vendor/github.com/cpuguy83/go-md2man/v2/md2man/md2man.go
@@ -9,6 +9,8 @@ func Render(doc []byte) []byte {
 	renderer := NewRoffRenderer()
 
 	return blackfriday.Run(doc,
-		[]blackfriday.Option{blackfriday.WithRenderer(renderer),
-			blackfriday.WithExtensions(renderer.GetExtensions())}...)
+		[]blackfriday.Option{
+			blackfriday.WithRenderer(renderer),
+			blackfriday.WithExtensions(renderer.GetExtensions()),
+		}...)
 }
diff --git a/vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go b/vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go
index be2b3436..8a290f19 100644
--- a/vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go
+++ b/vendor/github.com/cpuguy83/go-md2man/v2/md2man/roff.go
@@ -1,6 +1,8 @@
 package md2man
 
 import (
+	"bufio"
+	"bytes"
 	"fmt"
 	"io"
 	"os"
@@ -20,34 +22,35 @@ type roffRenderer struct {
 }
 
 const (
-	titleHeader      = ".TH "
-	topLevelHeader   = "\n\n.SH "
-	secondLevelHdr   = "\n.SH "
-	otherHeader      = "\n.SS "
-	crTag            = "\n"
-	emphTag          = "\\fI"
-	emphCloseTag     = "\\fP"
-	strongTag        = "\\fB"
-	strongCloseTag   = "\\fP"
-	breakTag         = "\n.br\n"
-	paraTag          = "\n.PP\n"
-	hruleTag         = "\n.ti 0\n\\l'\\n(.lu'\n"
-	linkTag          = "\n\\[la]"
-	linkCloseTag     = "\\[ra]"
-	codespanTag      = "\\fB\\fC"
-	codespanCloseTag = "\\fR"
-	codeTag          = "\n.PP\n.RS\n\n.nf\n"
-	codeCloseTag     = "\n.fi\n.RE\n"
-	quoteTag         = "\n.PP\n.RS\n"
-	quoteCloseTag    = "\n.RE\n"
-	listTag          = "\n.RS\n"
-	listCloseTag     = "\n.RE\n"
-	dtTag            = "\n.TP\n"
-	dd2Tag           = "\n"
-	tableStart       = "\n.TS\nallbox;\n"
-	tableEnd         = ".TE\n"
-	tableCellStart   = "T{\n"
-	tableCellEnd     = "\nT}\n"
+	titleHeader       = ".TH "
+	topLevelHeader    = "\n\n.SH "
+	secondLevelHdr    = "\n.SH "
+	otherHeader       = "\n.SS "
+	crTag             = "\n"
+	emphTag           = "\\fI"
+	emphCloseTag      = "\\fP"
+	strongTag         = "\\fB"
+	strongCloseTag    = "\\fP"
+	breakTag          = "\n.br\n"
+	paraTag           = "\n.PP\n"
+	hruleTag          = "\n.ti 0\n\\l'\\n(.lu'\n"
+	linkTag           = "\n\\[la]"
+	linkCloseTag      = "\\[ra]"
+	codespanTag       = "\\fB"
+	codespanCloseTag  = "\\fR"
+	codeTag           = "\n.EX\n"
+	codeCloseTag      = ".EE\n" // Do not prepend a newline character since code blocks, by definition, include a newline already (or at least as how blackfriday gives us on).
+	quoteTag          = "\n.PP\n.RS\n"
+	quoteCloseTag     = "\n.RE\n"
+	listTag           = "\n.RS\n"
+	listCloseTag      = "\n.RE\n"
+	dtTag             = "\n.TP\n"
+	dd2Tag            = "\n"
+	tableStart        = "\n.TS\nallbox;\n"
+	tableEnd          = ".TE\n"
+	tableCellStart    = "T{\n"
+	tableCellEnd      = "\nT}\n"
+	tablePreprocessor = `'\" t`
 )
 
 // NewRoffRenderer creates a new blackfriday Renderer for generating roff documents
@@ -74,6 +77,16 @@ func (r *roffRenderer) GetExtensions() blackfriday.Extensions {
 
 // RenderHeader handles outputting the header at document start
 func (r *roffRenderer) RenderHeader(w io.Writer, ast *blackfriday.Node) {
+	// We need to walk the tree to check if there are any tables.
+	// If there are, we need to enable the roff table preprocessor.
+	ast.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+		if node.Type == blackfriday.Table {
+			out(w, tablePreprocessor+"\n")
+			return blackfriday.Terminate
+		}
+		return blackfriday.GoToNext
+	})
+
 	// disable hyphenation
 	out(w, ".nh\n")
 }
@@ -86,8 +99,7 @@ func (r *roffRenderer) RenderFooter(w io.Writer, ast *blackfriday.Node) {
 // RenderNode is called for each node in a markdown document; based on the node
 // type the equivalent roff output is sent to the writer
 func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
-
-	var walkAction = blackfriday.GoToNext
+	walkAction := blackfriday.GoToNext
 
 	switch node.Type {
 	case blackfriday.Text:
@@ -109,9 +121,16 @@ func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering
 			out(w, strongCloseTag)
 		}
 	case blackfriday.Link:
-		if !entering {
-			out(w, linkTag+string(node.LinkData.Destination)+linkCloseTag)
+		// Don't render the link text for automatic links, because this
+		// will only duplicate the URL in the roff output.
+		// See https://daringfireball.net/projects/markdown/syntax#autolink
+		if !bytes.Equal(node.LinkData.Destination, node.FirstChild.Literal) {
+			out(w, string(node.FirstChild.Literal))
 		}
+		// Hyphens in a link must be escaped to avoid word-wrap in the rendered man page.
+		escapedLink := strings.ReplaceAll(string(node.LinkData.Destination), "-", "\\-")
+		out(w, linkTag+escapedLink+linkCloseTag)
+		walkAction = blackfriday.SkipChildren
 	case blackfriday.Image:
 		// ignore images
 		walkAction = blackfriday.SkipChildren
@@ -160,6 +179,11 @@ func (r *roffRenderer) RenderNode(w io.Writer, node *blackfriday.Node, entering
 		r.handleTableCell(w, node, entering)
 	case blackfriday.HTMLSpan:
 		// ignore other HTML tags
+	case blackfriday.HTMLBlock:
+		if bytes.HasPrefix(node.Literal, []byte("<!--")) {
+			break // ignore comments, no warning
+		}
+		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
 	default:
 		fmt.Fprintln(os.Stderr, "WARNING: go-md2man does not handle node type "+node.Type.String())
 	}
@@ -254,7 +278,7 @@ func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, ente
 			start = "\t"
 		}
 		if node.IsHeader {
-			start += codespanTag
+			start += strongTag
 		} else if nodeLiteralSize(node) > 30 {
 			start += tableCellStart
 		}
@@ -262,7 +286,7 @@ func (r *roffRenderer) handleTableCell(w io.Writer, node *blackfriday.Node, ente
 	} else {
 		var end string
 		if node.IsHeader {
-			end = codespanCloseTag
+			end = strongCloseTag
 		} else if nodeLiteralSize(node) > 30 {
 			end = tableCellEnd
 		}
@@ -310,6 +334,28 @@ func out(w io.Writer, output string) {
 }
 
 func escapeSpecialChars(w io.Writer, text []byte) {
+	scanner := bufio.NewScanner(bytes.NewReader(text))
+
+	// count the number of lines in the text
+	// we need to know this to avoid adding a newline after the last line
+	n := bytes.Count(text, []byte{'\n'})
+	idx := 0
+
+	for scanner.Scan() {
+		dt := scanner.Bytes()
+		if idx < n {
+			idx++
+			dt = append(dt, '\n')
+		}
+		escapeSpecialCharsLine(w, dt)
+	}
+
+	if err := scanner.Err(); err != nil {
+		panic(err)
+	}
+}
+
+func escapeSpecialCharsLine(w io.Writer, text []byte) {
 	for i := 0; i < len(text); i++ {
 		// escape initial apostrophe or period
 		if len(text) >= 1 && (text[0] == '\'' || text[0] == '.') {
diff --git a/vendor/github.com/urfave/cli/v2/app.go b/vendor/github.com/urfave/cli/v2/app.go
index 6e6f6d0d..af072e76 100644
--- a/vendor/github.com/urfave/cli/v2/app.go
+++ b/vendor/github.com/urfave/cli/v2/app.go
@@ -229,8 +229,6 @@ func (a *App) Setup() {
 		a.separator.disabled = true
 	}
 
-	var newCommands []*Command
-
 	for _, c := range a.Commands {
 		cname := c.Name
 		if c.HelpName != "" {
@@ -239,9 +237,7 @@ func (a *App) Setup() {
 		c.separator = a.separator
 		c.HelpName = fmt.Sprintf("%s %s", a.HelpName, cname)
 		c.flagCategories = newFlagCategoriesFromFlags(c.Flags)
-		newCommands = append(newCommands, c)
 	}
-	a.Commands = newCommands
 
 	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
 		if !a.HideHelpCommand {
diff --git a/vendor/github.com/urfave/cli/v2/category.go b/vendor/github.com/urfave/cli/v2/category.go
index b1847eca..0986fffc 100644
--- a/vendor/github.com/urfave/cli/v2/category.go
+++ b/vendor/github.com/urfave/cli/v2/category.go
@@ -104,7 +104,7 @@ func newFlagCategoriesFromFlags(fs []Flag) FlagCategories {
 	var categorized bool
 	for _, fl := range fs {
 		if cf, ok := fl.(CategorizableFlag); ok {
-			if cat := cf.GetCategory(); cat != "" {
+			if cat := cf.GetCategory(); cat != "" && cf.IsVisible() {
 				fc.AddFlag(cat, cf)
 				categorized = true
 			}
@@ -114,7 +114,7 @@ func newFlagCategoriesFromFlags(fs []Flag) FlagCategories {
 	if categorized {
 		for _, fl := range fs {
 			if cf, ok := fl.(CategorizableFlag); ok {
-				if cf.GetCategory() == "" {
+				if cf.GetCategory() == "" && cf.IsVisible() {
 					fc.AddFlag("", fl)
 				}
 			}
diff --git a/vendor/github.com/urfave/cli/v2/command.go b/vendor/github.com/urfave/cli/v2/command.go
index c20a571e..472c1ff4 100644
--- a/vendor/github.com/urfave/cli/v2/command.go
+++ b/vendor/github.com/urfave/cli/v2/command.go
@@ -132,15 +132,12 @@ func (c *Command) setup(ctx *Context) {
 	}
 	sort.Sort(c.categories.(*commandCategories))
 
-	var newCmds []*Command
 	for _, scmd := range c.Subcommands {
 		if scmd.HelpName == "" {
 			scmd.HelpName = fmt.Sprintf("%s %s", c.HelpName, scmd.Name)
 		}
 		scmd.separator = c.separator
-		newCmds = append(newCmds, scmd)
 	}
-	c.Subcommands = newCmds
 
 	if c.BashComplete == nil {
 		c.BashComplete = DefaultCompleteWithFlags(c)
diff --git a/vendor/github.com/urfave/cli/v2/template.go b/vendor/github.com/urfave/cli/v2/template.go
index daad4700..5748f4c2 100644
--- a/vendor/github.com/urfave/cli/v2/template.go
+++ b/vendor/github.com/urfave/cli/v2/template.go
@@ -1,7 +1,7 @@
 package cli
 
 var helpNameTemplate = `{{$v := offset .HelpName 6}}{{wrap .HelpName 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}`
-var usageTemplate = `{{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}{{if .Args}}[arguments...]{{end}}[arguments...]{{end}}{{end}}`
+var usageTemplate = `{{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}}{{if .ArgsUsage}}{{.ArgsUsage}}{{else}}{{if .Args}} [arguments...]{{end}}{{end}}{{end}}`
 var descriptionTemplate = `{{wrap .Description 3}}`
 var authorsTemplate = `{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
    {{range $index, $author := .Authors}}{{if $index}}
diff --git a/vendor/github.com/xrash/smetrics/soundex.go b/vendor/github.com/xrash/smetrics/soundex.go
index a2ad034d..18c3aef7 100644
--- a/vendor/github.com/xrash/smetrics/soundex.go
+++ b/vendor/github.com/xrash/smetrics/soundex.go
@@ -6,36 +6,58 @@ import (
 
 // The Soundex encoding. It is a phonetic algorithm that considers how the words sound in English. Soundex maps a string to a 4-byte code consisting of the first letter of the original string and three numbers. Strings that sound similar should map to the same code.
 func Soundex(s string) string {
-	m := map[byte]string{
-		'B': "1", 'P': "1", 'F': "1", 'V': "1",
-		'C': "2", 'S': "2", 'K': "2", 'G': "2", 'J': "2", 'Q': "2", 'X': "2", 'Z': "2",
-		'D': "3", 'T': "3",
-		'L': "4",
-		'M': "5", 'N': "5",
-		'R': "6",
-	}
-
-	s = strings.ToUpper(s)
+	b := strings.Builder{}
+	b.Grow(4)
 
-	r := string(s[0])
 	p := s[0]
-	for i := 1; i < len(s) && len(r) < 4; i++ {
+	if p <= 'z' && p >= 'a' {
+		p -= 32 // convert to uppercase
+	}
+	b.WriteByte(p)
+
+	n := 0
+	for i := 1; i < len(s); i++ {
 		c := s[i]
 
-		if (c < 'A' || c > 'Z') || (c == p) {
+		if c <= 'z' && c >= 'a' {
+			c -= 32 // convert to uppercase
+		} else if c < 'A' || c > 'Z' {
+			continue
+		}
+
+		if c == p {
 			continue
 		}
 
 		p = c
 
-		if n, ok := m[c]; ok {
-			r += n
+		switch c {
+		case 'B', 'P', 'F', 'V':
+			c = '1'
+		case 'C', 'S', 'K', 'G', 'J', 'Q', 'X', 'Z':
+			c = '2'
+		case 'D', 'T':
+			c = '3'
+		case 'L':
+			c = '4'
+		case 'M', 'N':
+			c = '5'
+		case 'R':
+			c = '6'
+		default:
+			continue
+		}
+
+		b.WriteByte(c)
+		n++
+		if n == 3 {
+			break
 		}
 	}
 
-	for i := len(r); i < 4; i++ {
-		r += "0"
+	for i := n; i < 3; i++ {
+		b.WriteByte('0')
 	}
 
-	return r
+	return b.String()
 }
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 4ed8500d..e217e5e1 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -4,7 +4,7 @@ github.com/briandowns/spinner
 # github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
 ## explicit
 github.com/chzyer/readline
-# github.com/cpuguy83/go-md2man/v2 v2.0.2
+# github.com/cpuguy83/go-md2man/v2 v2.0.4
 ## explicit; go 1.11
 github.com/cpuguy83/go-md2man/v2/md2man
 # github.com/davecgh/go-spew v1.1.1
@@ -48,11 +48,11 @@ github.com/savioxavier/termlink
 ## explicit; go 1.17
 github.com/stretchr/testify/assert
 github.com/stretchr/testify/require
-# github.com/urfave/cli/v2 v2.27.1
+# github.com/urfave/cli/v2 v2.27.2
 ## explicit; go 1.18
 github.com/urfave/cli/v2
-# github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673
-## explicit
+# github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913
+## explicit; go 1.15.0
 github.com/xrash/smetrics
 # golang.org/x/exp v0.0.0-20240213143201-ec583247a57a
 ## explicit; go 1.20