You are given a code:

def main_solution(x):
    return func_20(func_15('yveacb'), ('tbp' + 'tfrgvn'))

Can you predict the output of `main_solution("gqkhuxhy")` 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": "gqkhuxhy"}, "ref_output": "\u00abtyb\u00bbp\u00abtvf\u00bbr\u00abgev\u00bbn\u00aba\u00bb\u00abc\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('yveacb'), ('tbp' + 'tfrgvn'))", "funcname": "main_solution"}
rule