You are given a code:

def main_solution(x):
    return func_20(func_4('mvikby'), func_15('jbsxto'))

Can you predict the output of `main_solution("tbezmhbo")` 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": "tbezmhbo"}, "ref_output": "m\u00abvji\u00bbk\u00abbby\u00bb\u00abs\u00bb\u00abx\u00bb\u00abt\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_4('mvikby'), func_15('jbsxto'))", "funcname": "main_solution"}
rule