Create a function that turns an array of words into a comma separated list, where the last word is separated by the word "and".
wordsToSentence(["innokodakademija"]) ➞ "innokodakademija"
wordsToSentence(["Hello", "", "Bye"]) ➞ "Hello and Bye"
wordsToSentence(["Hello", "Bye", "See you soon"]) ➞ "Hello, Bye and See you soon"
null values, empty arrays or arrays with only empty or null values should return an empty string (e.g. "").