You are given a code:

def main_solution(x):
    return func_20(func_15('hdglba'), func_20('kxuau', x))

Can you predict the output of `main_solution("qrkvcg")` 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": "qrkvcg"}, "ref_output": "\u00abkhq\u00bbx\u00abrdu\u00bbk\u00abagv\u00bbu\u00abclg\u00bb\u00abb\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('hdglba'), func_20('kxuau', x))", "funcname": "main_solution"}
rule