You are given a code:

def main_solution(x):
    return ('ycc' + 'iebufh')

Can you predict the output of `main_solution("vnhkcopex")` 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": "vnhkcopex"}, "ref_output": "ycciebufh", "ref_code": "def main_solution(x):\n    return ('ycc' + 'iebufh')", "funcname": "main_solution"}
rule