You are given a code:

def main_solution(x):
    return func_13(func_5('sipfvn', 'hkj'), '|')

Can you predict the output of `main_solution("vljuhjvzd")` 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": "vljuhjvzd"}, "ref_output": "h|k|j|s|i|p|f|v|n", "ref_code": "def main_solution(x):\n    return func_13(func_5('sipfvn', 'hkj'), '|')", "funcname": "main_solution"}
rule