You are given a code:

def main_solution(x):
    return func_20('sdl', x)

Can you predict the output of `main_solution("rdapizjow")` 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": "rdapizjow"}, "ref_output": "srddlapizjow", "ref_code": "def main_solution(x):\n    return func_20('sdl', x)", "funcname": "main_solution"}
rule