You are given a code:

def main_solution(x):
    return ('myn' + 'ybiew')

Can you predict the output of `main_solution("pekg")` 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": "pekg"}, "ref_output": "mynybiew", "ref_code": "def main_solution(x):\n    return ('myn' + 'ybiew')", "funcname": "main_solution"}
rule