You are given a code:

def main_solution(x):
    return func_20(func_13('thxmpv', '|'), func_9(x))

Can you predict the output of `main_solution("tbfch")` 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": "tbfch"}, "ref_output": "tt|bhf|cxh|hmc|fpb|tv", "ref_code": "def main_solution(x):\n    return func_20(func_13('thxmpv', '|'), func_9(x))", "funcname": "main_solution"}
rule