You are given a code:

def main_solution(x):
    return func_20(func_15('teig'), ('cwiaps' + 'woin'))

Can you predict the output of `main_solution("gfsmhx")` 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": "gfsmhx"}, "ref_output": "\u00abctw\u00bbi\u00abaep\u00bbs\u00abwio\u00bbi\u00abng\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('teig'), ('cwiaps' + 'woin'))", "funcname": "main_solution"}
rule