outputs the shortest unique prefixes of elements in an array
example usage:
const items = ["5973", "2883", "5808", "7150",
"3276", "4461", "4147", "8354",
"7492", "4580", "9620", "5570"]
> shortest-unique-prefix(items)
//returns an array of shortest unique prefixes
> ["59", "2", "58", "71", "3", "44", "41", "8", "74", "45", "9", "55"]
> shortest-unique-prefix(items, { alias:true })
> { 2: "2883", 3: "3276", 8: "8354", 9: "9620", 41: "4147", 44: "4461", 45: "4580",
55: "5570", 58: "5808", 59: "5973", 71: "7150", 74: "7492"}