You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_5('zilyz', 'lm'))

Can you predict the output of `main_solution("pqgvwm")` 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": "pqgvwm"}, "ref_output": "\u00ablpm\u00bbz\u00abiql\u00bby\u00abzg\u00bb\u00abv\u00bb\u00abw\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_5('zilyz', 'lm'))", "funcname": "main_solution"}
rule