You are given a code:

def main_solution(x):
    return ('ndmivr' + 'jrwfz')

Can you predict the output of `main_solution("nfidw")` 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": "nfidw"}, "ref_output": "ndmivrjrwfz", "ref_code": "def main_solution(x):\n    return ('ndmivr' + 'jrwfz')", "funcname": "main_solution"}
rule