You are given a code:

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

Can you predict the output of `main_solution("yootzu")` 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": "yootzu"}, "ref_output": "m\u00absgu\u00bby\u00abojo\u00bbt\u00abzmu\u00bb\u00abx\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('msu' + x), func_15('gjmxm'))", "funcname": "main_solution"}
rule