You are given a code:

def main_solution(x):
    return ('dwhp' + 'gqcgi')

Can you predict the output of `main_solution("mfgmr")` 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": "mfgmr"}, "ref_output": "dwhpgqcgi", "ref_code": "def main_solution(x):\n    return ('dwhp' + 'gqcgi')", "funcname": "main_solution"}
rule