You are given a code:

def main_solution(x):
    return func_20(func_23('nywi', 2), func_15('cpsnp'))

Can you predict the output of `main_solution("dtd")` 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": "dtd"}, "ref_output": "n\u00abycw\u00bbi\u00ab1p\u00bb\u00abs\u00bb\u00abn\u00bb\u00abp\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_23('nywi', 2), func_15('cpsnp'))", "funcname": "main_solution"}
rule