You are given a code:

def main_solution(x):
    return func_20(func_1('ujni', 2), func_13('iwgwun', '|'))

Can you predict the output of `main_solution("ppallue")` 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": "ppallue"}, "ref_output": "uij|nwi|ugj|nwi|u|n", "ref_code": "def main_solution(x):\n    return func_20(func_1('ujni', 2), func_13('iwgwun', '|'))", "funcname": "main_solution"}
rule