Problem

Validate string against dictionary

1. Given a string and a list of words, determine if the string is valid based on the list of words

2. Determine if the given string contains valid words while ignoring extraneous characters

Example 1

'this is a test'
['this', 'is', 'a', 'test']
Returns true

Example 2

'this is a test'
['this', 'a', 'test']
Returns false