Your code is really hard to read, because it is not well indented (maybe perltidy can help with that), and the variable and function names are far from explicit and kind of all look the same.

Luckily for you, even though you didn't explain how you go from raaaammmmmaaaaaj to r0a3m4a4j0 and back, the technique is common enough that it is not too hard to spot. This is called run length encoding, there might be a module out there that does that for you but you can also look at the first solution here. In that example the number is put before the character, and there's going to be an offset of 1 with your expected output (raaa will be coded as 1r3a instead of r0a2), but a little tinkering should give you what you want.