You are given a code:

def main_solution(x):
    return func_20(func_11(x, 2), func_15('bgykhm'))

Can you predict the output of `main_solution("thgymsfix")` 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": "thgymsfix"}, "ref_output": "v\u00abjbi\u00bba\u00abogu\u00bbh\u00abkyz\u00bb\u00abk\u00bb\u00abh\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_11(x, 2), func_15('bgykhm'))", "funcname": "main_solution"}
rule