You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'nr'), func_15('asqjy'))

Can you predict the output of `main_solution("aefy")` 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": "aefy"}, "ref_output": "n\u00abraa\u00bbe\u00abfsy\u00bb\u00abq\u00bb\u00abj\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'nr'), func_15('asqjy'))", "funcname": "main_solution"}
rule