You are given a code:

def main_solution(x):
    return func_20(func_15('ehes'), func_1(x, 2))

Can you predict the output of `main_solution("crbumaf")` 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": "crbumaf"}, "ref_output": "\u00abcer\u00bbb\u00abuhm\u00bba\u00abfec\u00bbr\u00abbsu\u00bbmaf", "ref_code": "def main_solution(x):\n    return func_20(func_15('ehes'), func_1(x, 2))", "funcname": "main_solution"}
rule