You are given a code:

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

Can you predict the output of `main_solution("ghmmnvea")` 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": "ghmmnvea"}, "ref_output": "g|p|h|p|m|o|m|h|n|v|e|a", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'ppoh'), '|')", "funcname": "main_solution"}
rule