You are given a code:

def main_solution(x):
    return func_20(('ibcm' + 'ger'), func_15('kaucta'))

Can you predict the output of `main_solution("gki")` 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": "gki"}, "ref_output": "i\u00abbkc\u00bbm\u00abgae\u00bbr\u00abu\u00bb\u00abc\u00bb\u00abt\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('ibcm' + 'ger'), func_15('kaucta'))", "funcname": "main_solution"}
rule