You are given a code:

def main_solution(x):
    return ('atf' + 'quhvc')

Can you predict the output of `main_solution("uizxhucvhz")` 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": "uizxhucvhz"}, "ref_output": "atfquhvc", "ref_code": "def main_solution(x):\n    return ('atf' + 'quhvc')", "funcname": "main_solution"}
rule