Cody

# Problem 848. Calculate a modified Levenshtein distance between two strings

Inspired by the Cody problem found here.

The Levenshtein distance is a charater-based string metric used to measure the difference between two strings (for details, look here). In this problem, you need to implement a word-based version of the Levenshtein distance.

Given two strings, compute the minimum number of word-edits to transform one string into another. The allowable edits are insertion, deletion, or substitution of a single word. Assume words are case-insensitive. Contractions and hyphenated words are allowed, but you may ignore other punctuation.

Example

If

```s1 = 'I do not like MATLAB'
s2 = 'I love MATLAB a lot'
```

then

```d = 4
```

because at least four edits are required to transform s1 into s2 (substitution on the last four words).

### Solution Stats

48.39% Correct | 51.61% Incorrect
Last solution submitted on Oct 31, 2016

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