You are given a code:

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

Can you predict the output of `main_solution("fmayroe")` 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": "fmayroe"}, "ref_output": "f|q|m|a|a|m|y|v|r|p|o|e", "ref_code": "def main_solution(x):\n    return func_13(func_20(x, 'qamvp'), '|')", "funcname": "main_solution"}
rule