You are given a code:

def main_solution(x):
    return ('ohycct' + 'oqv')

Can you predict the output of `main_solution("vopuvpj")` 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": "vopuvpj"}, "ref_output": "ohycctoqv", "ref_code": "def main_solution(x):\n    return ('ohycct' + 'oqv')", "funcname": "main_solution"}
rule