You are given a code:

def main_solution(x):
    return func_20(func_15('nylanf'), func_5('ctlmia', 'uwfo'))

Can you predict the output of `main_solution("qqfgezkrt")` 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": "qqfgezkrt"}, "ref_output": "\u00abunw\u00bbf\u00aboyc\u00bbt\u00abllm\u00bbi\u00abaa\u00bb\u00abn\u00bb\u00abf\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('nylanf'), func_5('ctlmia', 'uwfo'))", "funcname": "main_solution"}
rule