Given three Strings, str1, str2 and str3, return the longest String. If all three Strings have the same length, return "same". There will not be a tie between two longest Strings.

Question

longestString("apple", "banana", "pear") → "banana"
longestString("one", "two", "three") → "three"
longestString("bob", "jim", "joe") → "same"