You are given a code:

def main_solution(x):
    return func_13(func_5(x, 'kmu'), '|')

Can you predict the output of `main_solution("hbjivzwre")` 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": "hbjivzwre"}, "ref_output": "k|m|u|h|b|j|i|v|z|w|r|e", "ref_code": "def main_solution(x):\n    return func_13(func_5(x, 'kmu'), '|')", "funcname": "main_solution"}
rule