You are given a code:

def main_solution(x):
    return func_13(func_5('vqucrw', 'uxol'), '|')

Can you predict the output of `main_solution("dkl")` 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": "dkl"}, "ref_output": "u|x|o|l|v|q|u|c|r|w", "ref_code": "def main_solution(x):\n    return func_13(func_5('vqucrw', 'uxol'), '|')", "funcname": "main_solution"}
rule