You are given a code:

def main_solution(x):
    return ('yopm' + 'nkxxm')

Can you predict the output of `main_solution("wjuhyh")` 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": "wjuhyh"}, "ref_output": "yopmnkxxm", "ref_code": "def main_solution(x):\n    return ('yopm' + 'nkxxm')", "funcname": "main_solution"}
rule