An abecedarian word is a word where all of its letters are arranged in alphabetical order. Examples of these words include:
Given an array of words, create a function which returns the longest abecedarian word. If no word in an array matches the criterea, return an empty string.
LongestAbecedarian(new string[] { "ace", "spades", "hearts", "clubs" }) ➞ "ace"
LongestAbecedarian(new string[] { "forty", "choppy", "ghost" }) ➞ "choppy"
LongestAbecedarian(new string[] { "one", "two", "three" }) ➞ ""