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that link you posted all those letters dont make sense 2 3 4 CR etc etc confusing any guides with just normal xbox buttons from in game
I can tell from your typing that you're not the sharpest tool in the shed, but I'll explain them.
Numbers such as 2, 1, 4, etc are directions to point your control stick or D-Pad. Assuming you have one, look to the left of your keyboard. See those numbers? They should be arranged like this:
789 456 123
All instructions for moves people provide are traditionally if you're on the left side facing right, so if someone says "4B" it means backward Y, since Y is B in game commands. 2 is always down, 8 is always up, etc. If you are on the right facing left, flip the numbers around, and 4 suddenly means forward while 6 means back.
Some letters are character-specific and stand for stances, but the ones like CE and BE (Critical Edge and Brave Edge), GI and aGI (Guard Impact and Auto-Guard Impact) are universal. You will just have to get used to seeing and learning these on your own.