You are given a code:

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

Can you predict the output of `main_solution("pjrwn")` 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": "pjrwn"}, "ref_output": "p|g|j|k|r|v|w|x|n|e", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'gkvxe'), '|')", "funcname": "main_solution"}
rule