You are given a code:

def main_solution(x):
    return (func_23('ovi', 3) + (x + 'cocmk'))

Can you predict the output of `main_solution("dovckntvzb")` 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": "dovckntvzb"}, "ref_output": "ovi1dovckntvzbcocmk", "ref_code": "def main_solution(x):\n    return (func_23('ovi', 3) + (x + 'cocmk'))", "funcname": "main_solution"}
rule