You are given a code:

def main_solution(x):
    return ('ygw' + 'dxxy')

Can you predict the output of `main_solution("nuuvwip")` 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": "nuuvwip"}, "ref_output": "ygwdxxy", "ref_code": "def main_solution(x):\n    return ('ygw' + 'dxxy')", "funcname": "main_solution"}
rule