Write a machine-language program to input 4 upper case characters, convert them to lower case, and output the result on the output device. Write it in a format suitable for the loader and execute it on the Pep/8 simulator.

49 49 49 49 D1 71 F1 D1 71 F1 D1 71 F1 D1 71 F1 51 51 51 51 00 00 00 zz

This is what I have so far but it won't run