Frage im Vorstellungsgespräch bei L3Harris

Code challenge (for a Software Engineer II position): Write a code solution determining how to come up with all the English words that can be formed using 3 digits and their tele-alphanumeric associated letters on a keypad. 2-3-4 represents ABC - DEF - GHI. And code it in development environment using proper syntax - not pseudocode. 30 min.