You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'ywhjj'), func_15('xcv'))

Can you predict the output of `main_solution("qadahekxkk")` 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": "qadahekxkk"}, "ref_output": "q\u00abyxa\u00bbw\u00abdch\u00bba\u00abjvh\u00bbjekxkk", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'ywhjj'), func_15('xcv'))", "funcname": "main_solution"}
rule