You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_13('roxeev', '|'))

Can you predict the output of `main_solution("vqvwepnmq")` 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": "vqvwepnmq"}, "ref_output": "\u00abrv|\u00bbo\u00ab|qx\u00bb|\u00abev|\u00bbe\u00ab|wv\u00bb\u00abe\u00bb\u00abp\u00bb\u00abn\u00bb\u00abm\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('roxeev', '|'))", "funcname": "main_solution"}
rule