I’ve found it’s quite doable if you just “type” out different words on a blank keyboard and then use where your fingers land as the label. If you type “animal” you then know the position of all the constituent letters. So all you need to do is type a sentence with all characters, like “the quick brown fox jumps over the lazy dog.”

Interesting effect though. This reminds me that it’s almost impossible to draw a bicycle from memory. https://www.amusingplanet.com/2016/04/can-you-draw-bicycle-f...