You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'nlnc'), func_15('niisxb'))

Can you predict the output of `main_solution("dzgrhiyq")` 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": "dzgrhiyq"}, "ref_output": "d\u00abnnz\u00bbl\u00abgin\u00bbr\u00abcih\u00bbi\u00abysq\u00bb\u00abx\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'nlnc'), func_15('niisxb'))", "funcname": "main_solution"}
rule