You are given a code:

def main_solution(x):
    return (func_5('xewhjz', 'rrad') + func_13('ftnv', '|'))

Can you predict the output of `main_solution("khnlvjf")` 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": "khnlvjf"}, "ref_output": "rradxewhjzf|t|n|v", "ref_code": "def main_solution(x):\n    return (func_5('xewhjz', 'rrad') + func_13('ftnv', '|'))", "funcname": "main_solution"}
rule