You are given a code:

def main_solution(x):
    return ('nian' + 'jqmu')

Can you predict the output of `main_solution("wlmriy")` 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": "wlmriy"}, "ref_output": "nianjqmu", "ref_code": "def main_solution(x):\n    return ('nian' + 'jqmu')", "funcname": "main_solution"}
rule