You are given a code:

def main_solution(x):
    return func_20(func_13('vqxfau', '|'), func_17('wyz'))

Can you predict the output of `main_solution("xxibnvtgfj")` 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": "xxibnvtgfj"}, "ref_output": "vz|yqw|x|f|a|u", "ref_code": "def main_solution(x):\n    return func_20(func_13('vqxfau', '|'), func_17('wyz'))", "funcname": "main_solution"}
rule