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.

$49494949$ D$171$ F$1$ D$171$ F$1$ D$171$ F$1$ D$171$ F$151515151000000$ zz

This is what I have so far but it won't run. $($ this is object code in pep$8)$ using machine language $($hex$)$