You are given a code:

def main_solution(x):
    return func_15(func_20(x, 'rutn'))

Can you predict the output of `main_solution("rdazegrnc")` 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": "rdazegrnc"}, "ref_output": "\u00abr\u00bb\u00abr\u00bb\u00abd\u00bb\u00abu\u00bb\u00aba\u00bb\u00abt\u00bb\u00abz\u00bb\u00abn\u00bb\u00abe\u00bb\u00abg\u00bb\u00abr\u00bb\u00abn\u00bb\u00abc\u00bb", "ref_code": "def main_solution(x):\n    return func_15(func_20(x, 'rutn'))", "funcname": "main_solution"}
rule