You are given a code:

def main_solution(x):
    return func_20(func_3(x), func_15('wdqfra'))

Can you predict the output of `main_solution("xlvxxvlj")` 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": "xlvxxvlj"}, "ref_output": "j\u00ablwl\u00bbv\u00abvdx\u00bbx\u00abxq\u00bb\u00abf\u00bb\u00abr\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_3(x), func_15('wdqfra'))", "funcname": "main_solution"}
rule