You are given a code:

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

Can you predict the output of `main_solution("uwwqkltwnu")` 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": "uwwqkltwnu"}, "ref_output": "u\u00ab|cw\u00bb|\u00abwe|\u00bbq\u00ab|nk\u00bb|\u00abln|\u00bbt\u00ab|qw\u00bb|\u00abnq|\u00bbu", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '|'), func_15('cennqq'))", "funcname": "main_solution"}
rule