You are given a code:

def main_solution(x):
    return ('lrk' + 'cdg')

Can you predict the output of `main_solution("mhmqj")` 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": "mhmqj"}, "ref_output": "lrkcdg", "ref_code": "def main_solution(x):\n    return ('lrk' + 'cdg')", "funcname": "main_solution"}
rule