You are given a code:

def main_solution(x):
    return func_20(func_15('ygv'), func_13('nylonu', '|'))

Can you predict the output of `main_solution("poimv")` 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": "poimv"}, "ref_output": "\u00abny|\u00bby\u00ab|gl\u00bb|\u00abov|\u00bbn|u", "ref_code": "def main_solution(x):\n    return func_20(func_15('ygv'), func_13('nylonu', '|'))", "funcname": "main_solution"}
rule