You are given a code:

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

Can you predict the output of `main_solution("tzermufqo")` 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": "tzermufqo"}, "ref_output": "b|l|r|f|t|z|e|r|m|u|f|q|o", "ref_code": "def main_solution(x):\n    return func_13(func_5(x, 'blrf'), '|')", "funcname": "main_solution"}
rule