You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'vkyf'), func_15('jquoai'))

Can you predict the output of `main_solution("nuuy")` 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": "nuuy"}, "ref_output": "v\u00abkjy\u00bbf\u00abnqu\u00bbu\u00abyu\u00bb\u00abo\u00bb\u00aba\u00bb\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'vkyf'), func_15('jquoai'))", "funcname": "main_solution"}
rule