Create a function that accepts a string as an argument. Find its shortest word(s) and return them as an array sorted alphabetically (if there are multiple shortest words).
findShortestWords("I think the solution is fairly obvious.") ➞ ["i"]
findShortestWords("Chase two rabbits, catch none.") ➞ ["two"]
findShortestWords("We become what we think about.") ➞ ["we", "we"]
findShortestWords("The quick brown fox jumped over the lazy dogs back.") ➞ ["fox", "the", "the"]