Install letterize by entering the following commands in the terminal:
sudo apt update sudo apt install letterize
Description:
phone digits to letter-mnemonics
This program tries to help you find a letter mnemonic matching a given phone number. . It generates alphabetic mnemonics for the number, then filters them for phonetic plausibility in English, and displays the filtered list (usually a few hundred suggestions for a 7-digits phone-number).
Homepage: http://www.catb.org/~esr/letterize/
Version: 1.4-1build1
Section: universe/misc