Do a internet search for Morse Code decipher type program, where you can put your computer microphone next to the speaker on the radio and it will listen to the code and decode it for you.
Find a CW program and teach yourself morse code.
Its not hard.
Learn the numbers first - if you need to learn something fast.
They are a sequence of 5 dots or dah's.
.- - - -
..- - -
...- -
.... -
.....
-....
--...
---..
----.
-----
|