You are given a code:

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

Can you predict the output of `main_solution("bzpxwzk")` 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": "bzpxwzk"}, "ref_output": "p|p|t|w|v|d|w|m", "ref_code": "def main_solution(x):\n    return func_13(func_20('ptv', 'pwdwm'), '|')", "funcname": "main_solution"}
rule