You are given a code:

def main_solution(x):
    return func_13(func_20('ohbdla', 'hfspku'), '|')

Can you predict the output of `main_solution("bnarkns")` 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": "bnarkns"}, "ref_output": "o|h|h|f|b|s|d|p|l|k|a|u", "ref_code": "def main_solution(x):\n    return func_13(func_20('ohbdla', 'hfspku'), '|')", "funcname": "main_solution"}
rule