You are given a code:

def main_solution(x):
    return func_20(func_5('vxnssc', 'omv'), func_15('dbbhk'))

Can you predict the output of `main_solution("izjtba")` 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": "izjtba"}, "ref_output": "o\u00abmdv\u00bbv\u00abxbn\u00bbs\u00absbc\u00bb\u00abh\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('vxnssc', 'omv'), func_15('dbbhk'))", "funcname": "main_solution"}
rule