You are given a code:

def main_solution(x):
    return func_20(func_1('dugb', 4), func_15('rvkxw'))

Can you predict the output of `main_solution("tin")` 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": "tin"}, "ref_output": "d\u00aburg\u00bbb\u00abdvu\u00bbg\u00abbkd\u00bbu\u00abgxb\u00bbd\u00abuwg\u00bbb", "ref_code": "def main_solution(x):\n    return func_20(func_1('dugb', 4), func_15('rvkxw'))", "funcname": "main_solution"}
rule