You are given a code:

def main_solution(x):
    return (func_13('xkum', '|') + func_15('fesm'))

Can you predict the output of `main_solution("wvpgmj")` 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": "wvpgmj"}, "ref_output": "x|k|u|m\u00abf\u00bb\u00abe\u00bb\u00abs\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return (func_13('xkum', '|') + func_15('fesm'))", "funcname": "main_solution"}
rule