You are given a code:

def main_solution(x):
    return func_20('ctont', 'kmcak')

Can you predict the output of `main_solution("leobrihif")` 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": "leobrihif"}, "ref_output": "cktmocnatk", "ref_code": "def main_solution(x):\n    return func_20('ctont', 'kmcak')", "funcname": "main_solution"}
rule