You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'flmerr'), func_15('nfya'))

Can you predict the output of `main_solution("jenkvd")` 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": "jenkvd"}, "ref_output": "j\u00abfne\u00bbl\u00abnfm\u00bbk\u00abeyv\u00bbr\u00abdar\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'flmerr'), func_15('nfya'))", "funcname": "main_solution"}
rule