You are given a code:

def main_solution(x):
    return (func_13('nuevqt', '|') + func_13(x, '|'))

Can you predict the output of `main_solution("pnjmzkl")` 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": "pnjmzkl"}, "ref_output": "n|u|e|v|q|tp|n|j|m|z|k|l", "ref_code": "def main_solution(x):\n    return (func_13('nuevqt', '|') + func_13(x, '|'))", "funcname": "main_solution"}
rule