You are given a code:

def main_solution(x):
    return func_20(func_15('rosl'), func_20('kwnedg', 'wmxjuf'))

Can you predict the output of `main_solution("gpmtwj")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "gpmtwj"}, "ref_output": "\u00abkrw\u00bbw\u00abmon\u00bbx\u00abesj\u00bbd\u00abulg\u00bbf", "ref_code": "def main_solution(x):\n    return func_20(func_15('rosl'), func_20('kwnedg', 'wmxjuf'))", "funcname": "main_solution"}
rule