You can ask Two Letter Words to list the letters that can be played after a given letter and it will tell you all of the letters which can form a valid two letter Scrabble word. Useful for working out where to place those pesky last few tiles! List of valid two letter Scrabble words taken from: https://en.wikibooks.org/wiki/Scrabble/Two_Letter_Words
“Alexa, ask Two Letter Words to list letters I can play after Z”