You are given a code:

def main_solution(x):
    return ('jgyzf' + 'wxfp')

Can you predict the output of `main_solution("ujdgaycf")` 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": "ujdgaycf"}, "ref_output": "jgyzfwxfp", "ref_code": "def main_solution(x):\n    return ('jgyzf' + 'wxfp')", "funcname": "main_solution"}
rule