You are given a code:

def main_solution(x):
    return func_20(func_1('gqs', 4), func_15('beyexx'))

Can you predict the output of `main_solution("vudtj")` 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": "vudtj"}, "ref_output": "g\u00abqbs\u00bbg\u00abqes\u00bbg\u00abqys\u00bbg\u00abqes\u00bb\u00abx\u00bb\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('gqs', 4), func_15('beyexx'))", "funcname": "main_solution"}
rule