You are given a code:

def main_solution(x):
    return func_20(func_15('pmhb'), func_20(x, 'vqooum'))

Can you predict the output of `main_solution("vhogmmr")` 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": "vhogmmr"}, "ref_output": "\u00abvpv\u00bbh\u00abqmo\u00bbo\u00abgho\u00bbm\u00abubm\u00bbmr", "ref_code": "def main_solution(x):\n    return func_20(func_15('pmhb'), func_20(x, 'vqooum'))", "funcname": "main_solution"}
rule