Given a string, return true if the input string is an a permutation of palindrome or false if it is not.
Palindromes are strings that form the same word if it is reversed.
permutationPalindrome("gikig") == true
permutationPalindrome("ookvk") == true
permutationPalindrome("sows") == false
permutationPalindrome("tami") == false