You are given a code:

def main_solution(x):
    return (func_5(x, 'veup') + func_13('ewv', '|'))

Can you predict the output of `main_solution("rrnddgtxq")` 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": "rrnddgtxq"}, "ref_output": "veuprrnddgtxqe|w|v", "ref_code": "def main_solution(x):\n    return (func_5(x, 'veup') + func_13('ewv', '|'))", "funcname": "main_solution"}
rule