You are given a code:

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

Can you predict the output of `main_solution("vgpckhqhqw")` 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": "vgpckhqhqw"}, "ref_output": "v|m|g|c|p|m|c|x|k|h|q|h|q|w", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'mcmx'), '|')", "funcname": "main_solution"}
rule