You are given a code:

def main_solution(x):
    return ('luwpw' + 'wuzr')

Can you predict the output of `main_solution("yeavjkzy")` 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": "yeavjkzy"}, "ref_output": "luwpwwuzr", "ref_code": "def main_solution(x):\n    return ('luwpw' + 'wuzr')", "funcname": "main_solution"}
rule