You are given a code:

def main_solution(x):
    return func_20(func_5('pngt', 'bi'), func_15('cssvpb'))

Can you predict the output of `main_solution("jntjpsy")` 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": "jntjpsy"}, "ref_output": "b\u00abicp\u00bbn\u00abgst\u00bb\u00abs\u00bb\u00abv\u00bb\u00abp\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('pngt', 'bi'), func_15('cssvpb'))", "funcname": "main_solution"}
rule