You are given a code:

def main_solution(x):
    return ('kocu' + 'cdrf')

Can you predict the output of `main_solution("kjgkhbm")` 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": "kjgkhbm"}, "ref_output": "kocucdrf", "ref_code": "def main_solution(x):\n    return ('kocu' + 'cdrf')", "funcname": "main_solution"}
rule