You are given a code:

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

Can you predict the output of `main_solution("onnwr")` 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": "onnwr"}, "ref_output": "h|u|z|v|y|c|m|z|h|u|i|u", "ref_code": "def main_solution(x):\n    return func_13(('huzvyc' + 'mzhuiu'), '|')", "funcname": "main_solution"}
rule