You are given a code:

def main_solution(x):
    return func_20(('nrdxu' + 'lfcgc'), func_15('lju'))

Can you predict the output of `main_solution("cjaavdyv")` 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": "cjaavdyv"}, "ref_output": "n\u00abrld\u00bbx\u00abujl\u00bbf\u00abcug\u00bbc", "ref_code": "def main_solution(x):\n    return func_20(('nrdxu' + 'lfcgc'), func_15('lju'))", "funcname": "main_solution"}
rule