You are given a code:

def main_solution(x):
    return func_9(func_13('zbtaj', '|'))

Can you predict the output of `main_solution("biwcuszz")` 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": "biwcuszz"}, "ref_output": "z|b|t|a|jj|a|t|b|z", "ref_code": "def main_solution(x):\n    return func_9(func_13('zbtaj', '|'))", "funcname": "main_solution"}
rule