You are given a code:

def main_solution(x):
    return (func_20(x, 'ppgg') + func_22('stip'))

Can you predict the output of `main_solution("sktahebas")` 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": "sktahebas"}, "ref_output": "spkptgaghebasstip", "ref_code": "def main_solution(x):\n    return (func_20(x, 'ppgg') + func_22('stip'))", "funcname": "main_solution"}
rule