You are given a code:

def main_solution(x):
    return func_20(func_13(x, '|'), func_15('buayuo'))

Can you predict the output of `main_solution("gsjftp")` 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": "gsjftp"}, "ref_output": "g\u00ab|bs\u00bb|\u00abju|\u00bbf\u00ab|at\u00bb|\u00abpy\u00bb\u00abu\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '|'), func_15('buayuo'))", "funcname": "main_solution"}
rule