You are given a code:

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

Can you predict the output of `main_solution("fdbuyq")` 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": "fdbuyq"}, "ref_output": "f\u00abmia\u00bbj\u00abfgm\u00bba\u00abjd\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('fmaj', 2), func_15('igd'))", "funcname": "main_solution"}
rule