You are given a code:

def main_solution(x):
    return func_20(func_1('efumxj', 4), func_15('tuzwwm'))

Can you predict the output of `main_solution("hggem")` 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": "hggem"}, "ref_output": "e\u00abftu\u00bbm\u00abxuj\u00bbe\u00abfzu\u00bbm\u00abxwj\u00bbe\u00abfwu\u00bbm\u00abxmj\u00bbefumxj", "ref_code": "def main_solution(x):\n    return func_20(func_1('efumxj', 4), func_15('tuzwwm'))", "funcname": "main_solution"}
rule