You are given a code:

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

Can you predict the output of `main_solution("unmocgnkxx")` 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": "unmocgnkxx"}, "ref_output": "w|n|b|o|l|u|u|n|m|o|c|g|n|k|x|x", "ref_code": "def main_solution(x):\n    return func_13(('wnbolu' + x), '|')", "funcname": "main_solution"}
rule