You are given a code:

def main_solution(x):
    return func_20(func_9('sehqu'), func_15('rkrgkn'))

Can you predict the output of `main_solution("qdtoftaz")` 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": "qdtoftaz"}, "ref_output": "s\u00aberh\u00bbq\u00abuku\u00bbq\u00abhre\u00bbs\u00abg\u00bb\u00abk\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_9('sehqu'), func_15('rkrgkn'))", "funcname": "main_solution"}
rule