You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20('rqe', x))

Can you predict the output of `main_solution("hfdjbmzevh")` 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": "hfdjbmzevh"}, "ref_output": "\u00abrhh\u00bbq\u00abffe\u00bbd\u00abjdb\u00bbm\u00abzje\u00bbv\u00abhb\u00bb\u00abm\u00bb\u00abz\u00bb\u00abe\u00bb\u00abv\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20('rqe', x))", "funcname": "main_solution"}
rule