You are given a code:

def main_solution(x):
    return func_13((x + 'pwgpbs'), '|')

Can you predict the output of `main_solution("zjvrjudnxp")` 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": "zjvrjudnxp"}, "ref_output": "z|j|v|r|j|u|d|n|x|p|p|w|g|p|b|s", "ref_code": "def main_solution(x):\n    return func_13((x + 'pwgpbs'), '|')", "funcname": "main_solution"}
rule