1.4 - Palindrome Permutation

Given a string, write a function to check if it is a permutation of a palindrome. A palindrome is a word or phrase that is the same forwards and backwards. A permutation is a rearrangement of letters. The palindrome does not need to be limited to just dictionary words. EXAMPLE Input: Tact Coa Output: True (permutations: "taco cat", "atco cta", etc.)