You are given a code:

def main_solution(x):
    return func_20(func_1('hkimmt', 4), func_15(x))

Can you predict the output of `main_solution("pmfsvejfl")` 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": "pmfsvejfl"}, "ref_output": "h\u00abkpi\u00bbm\u00abmmt\u00bbh\u00abkfi\u00bbm\u00abmst\u00bbh\u00abkvi\u00bbm\u00abmet\u00bbh\u00abkji\u00bbm\u00abmft\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('hkimmt', 4), func_15(x))", "funcname": "main_solution"}
rule