You are given a code:

def main_solution(x):
    return func_20(func_15(x), (x + 'wwzew'))

Can you predict the output of `main_solution("bavlylnla")` 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": "bavlylnla"}, "ref_output": "\u00abbba\u00bbv\u00ablay\u00bbl\u00abnvl\u00bba\u00abwlw\u00bbz\u00abeyw\u00bb\u00abl\u00bb\u00abn\u00bb\u00abl\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), (x + 'wwzew'))", "funcname": "main_solution"}
rule