You are given a code:

def main_solution(x):
    return func_20(func_20('pjf', 'lcykj'), func_15('cgtu'))

Can you predict the output of `main_solution("pmduzh")` 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": "pmduzh"}, "ref_output": "p\u00ablcj\u00bbc\u00abfgy\u00bbk\u00abjt\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('pjf', 'lcykj'), func_15('cgtu'))", "funcname": "main_solution"}
rule