Use this trick one someone. It really works!

Tell them to think of the word: Taken. Give them a small amount of time, and then ask them to jumble the letters up in their head. Then have a new word with the same letters (doesnt have to be an existing one). Then ask them to pick a letter from the word in their head. to make it work plus effectively say precisely: "Now pick a letter from that word, okay?" and then when they nod, ask, "Was it K?". they should be most likely to say "whoa... yeah it was!" it worked on my mum, sister and most of my friends. See if it works for you!