rmmh

[0-9a-zA-Z]{2}

30-39,41-5a,61-7a

a:61 z:7a A:41 Z:5a 0:30 9:39

MSP430 alphanumeric shellcode is hard. There's no way to write to memory, 
no word-sized reg-reg operations, and all we have is add/sub/mov and a few conditional jumps.