You are given a code:

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

Can you predict the output of `main_solution("alzrvriwlu")` 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": "alzrvriwlu"}, "ref_output": "rclgdzba|l|z|r|v|r|i|w|l|u", "ref_code": "def main_solution(x):\n    return (('rclg' + 'dzb') + func_13(x, '|'))", "funcname": "main_solution"}
rule