You are given a code:

def main_solution(x):
    return ('gwih' + 'cbe')

Can you predict the output of `main_solution("mdqxravplu")` 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": "mdqxravplu"}, "ref_output": "gwihcbe", "ref_code": "def main_solution(x):\n    return ('gwih' + 'cbe')", "funcname": "main_solution"}
rule