You are given a code:

def main_solution(x):
    return ((x + x) + func_13('vbus', '|'))

Can you predict the output of `main_solution("crrnem")` 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": "crrnem"}, "ref_output": "crrnemcrrnemv|b|u|s", "ref_code": "def main_solution(x):\n    return ((x + x) + func_13('vbus', '|'))", "funcname": "main_solution"}
rule