You are given a code:

def main_solution(x):
    return func_20(func_15(x), ('gwvpyk' + 'xljsjd'))

Can you predict the output of `main_solution("kcfvj")` 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": "kcfvj"}, "ref_output": "\u00abgkw\u00bbv\u00abpcy\u00bbk\u00abxfl\u00bbj\u00absvj\u00bbd\u00abj\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), ('gwvpyk' + 'xljsjd'))", "funcname": "main_solution"}
rule