You are given a code:

def main_solution(x):
    return func_20('don', 'zmrhl')

Can you predict the output of `main_solution("zlshiwpa")` 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": "zlshiwpa"}, "ref_output": "dzomnrhl", "ref_code": "def main_solution(x):\n    return func_20('don', 'zmrhl')", "funcname": "main_solution"}
rule