Hamming distance is the number of characters that differ between two strings.

To illustrate:

String1: "abcbba"
String2: "abcbda"

Hamming Distance: 1 - "b" vs. "d" is the only difference.

Create a function that computes the hamming distance between two strings.

Examples

HammingDistance("abcde", "bcdef") ➞ 5

HammingDistance("abcde", "abcde") ➞ 0

HammingDistance("strong", "strung") ➞ 1

Notes

Both strings will have the same length.