Closest string

Closest string is a way of finding the string (or word) that is closest to another string. For example, if you have the word "cat" and you want to find the word that is closest to it, comparing it to all the other words in English can help you figure out which word is closest. The word that is closest might be "dog" because they both have 3 letters and you can only change one letter to make the other word.