You are given a code:

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

Can you predict the output of `main_solution("nwxqzgasw")` 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": "nwxqzgasw"}, "ref_output": "n\u00abwex\u00bbq\u00abzgg\u00bba\u00absqw\u00bb\u00abp\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_4(x), func_15('egqpq'))", "funcname": "main_solution"}
rule