You are given a code:

def main_solution(x):
    return func_13(func_4('dzzij'), '|')

Can you predict the output of `main_solution("cqcxubvbcw")` 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": "cqcxubvbcw"}, "ref_output": "d|z|z|i|j", "ref_code": "def main_solution(x):\n    return func_13(func_4('dzzij'), '|')", "funcname": "main_solution"}
rule