@paulasadoorian @Wraithe That seems like a waste of space. Just put the switch hook on the keyboard and make people tap it the right number of times to get the number.

Heck, you could replace the entire alphabet as well and use an LLM to guess which of the 3-4 letters you really meant.

Which reminds me. Bell Labs had a text-to-speech demo you could call. And the UI was typing “ls” and “cat textfile” to have it read them. It even did multiple voices for “whosonfirst”. You typed the Unix commands by entering the numbers on your phone that corresponded to the right letters.