You are given a code:

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

Can you predict the output of `main_solution("pcjwy")` 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": "pcjwy"}, "ref_output": "\u00ab|n|\u00bb|\u00ab|f|\u00bb|\u00ab|a|\u00bb|\u00ab|w|\u00bb", "ref_code": "def main_solution(x):\n    return func_13(func_15('nfaw'), '|')", "funcname": "main_solution"}
rule