You are given a code:

def main_solution(x):
    return func_20(('iwel' + x), func_15(x))

Can you predict the output of `main_solution("kfgqahum")` 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": "kfgqahum"}, "ref_output": "i\u00abwke\u00bbl\u00abkff\u00bbg\u00abqga\u00bbh\u00abuqm\u00bb\u00aba\u00bb\u00abh\u00bb\u00abu\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('iwel' + x), func_15(x))", "funcname": "main_solution"}
rule