You are given a code:

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

Can you predict the output of `main_solution("tduc")` 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": "tduc"}, "ref_output": "g|v|x|y|x|g|q|o|u|y", "ref_code": "def main_solution(x):\n    return func_13(('gvxy' + 'xgqouy'), '|')", "funcname": "main_solution"}
rule