You are given a code:

def main_solution(x):
    return (('xjf' + 'sxfzym') + func_3('nzusig'))

Can you predict the output of `main_solution("hslmfrlu")` 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": "hslmfrlu"}, "ref_output": "xjfsxfzymginsuz", "ref_code": "def main_solution(x):\n    return (('xjf' + 'sxfzym') + func_3('nzusig'))", "funcname": "main_solution"}
rule