You are given a code:

def main_solution(x):
    return func_20(func_15('paj'), func_20('gbbxtm', 'httnye'))

Can you predict the output of `main_solution("phlgpgmff")` 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": "phlgpgmff"}, "ref_output": "\u00abgph\u00bbb\u00abtab\u00bbt\u00abxjn\u00bbtyme", "ref_code": "def main_solution(x):\n    return func_20(func_15('paj'), func_20('gbbxtm', 'httnye'))", "funcname": "main_solution"}
rule