You are given a code:

def main_solution(x):
    return func_20(func_5('zdoo', 'om'), func_15('xta'))

Can you predict the output of `main_solution("ble")` 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": "ble"}, "ref_output": "o\u00abmxz\u00bbd\u00aboto\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('zdoo', 'om'), func_15('xta'))", "funcname": "main_solution"}
rule