You are given a code:

def main_solution(x):
    return (func_5('tkfk', 'mvvx') + func_1('nhlqk', 4))

Can you predict the output of `main_solution("vxpk")` 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": "vxpk"}, "ref_output": "mvvxtkfknhlqknhlqknhlqknhlqk", "ref_code": "def main_solution(x):\n    return (func_5('tkfk', 'mvvx') + func_1('nhlqk', 4))", "funcname": "main_solution"}
rule