I have another one with 32 number and letter starting with 02e9
All characters are all 0-9 and A-F
You can see an example of hexadecimal bitcoin private key below, the letters can be in lower case too. But such private keys are not 32 characters, it consists of 64 characters.
Private Key Hexadecimal Format (64 characters [0-9A-F]):
5D417D7FAB15759F1C3671A09C5AE7B132569D08A2647A49F3B4AF6B29226A38