You are given a code:

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

Can you predict the output of `main_solution("xtmzychrrx")` 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": "xtmzychrrx"}, "ref_output": "x\u00abuxt\u00bbq\u00abmts\u00bbz\u00abgmy\u00bbl\u00abczh\u00bbr\u00abryx\u00bb\u00abc\u00bb\u00abh\u00bb\u00abr\u00bb\u00abr\u00bb\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'uqsgl'), func_15(x))", "funcname": "main_solution"}
rule