You are given a code:

def main_solution(x):
    return func_20('dwss', 'pobeky')

Can you predict the output of `main_solution("fkkgi")` 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": "fkkgi"}, "ref_output": "dpwosbseky", "ref_code": "def main_solution(x):\n    return func_20('dwss', 'pobeky')", "funcname": "main_solution"}
rule