You are given a code:

def main_solution(x):
    return func_20(func_4(x), func_15('rqgt'))

Can you predict the output of `main_solution("jmowhwqzcs")` 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": "jmowhwqzcs"}, "ref_output": "j\u00abmro\u00bbw\u00abhqw\u00bbq\u00abzgc\u00bbs\u00abt\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_4(x), func_15('rqgt'))", "funcname": "main_solution"}
rule