You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_5('svqfdw', 'gehm'))

Can you predict the output of `main_solution("oysgb")` 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": "oysgb"}, "ref_output": "\u00abgoe\u00bbh\u00abmys\u00bbv\u00abqsf\u00bbd\u00abwg\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_5('svqfdw', 'gehm'))", "funcname": "main_solution"}
rule