1. Typing in all CAPS is considered shouting and rude.
2. What are you talking about? You can use A1, AAAAAAA, etc. to name macros.
If shortcuts, you can use combinations of keys and letters.
BTW, last I heard, there are 26 letters in the English alphabet.
You can also use the Shift key when you assign the letter for the
shortcut. So, you could have one macro that runs with Ctrl+a and one
that runs with Ctrl+Shift+a
If you run out of letters, you can add toolbar buttons or worksheet
buttons to run the macros.
Or, choose Tools>Macro>Macros, select a macro, and click Run