You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'di'), func_15('weywm'))

Can you predict the output of `main_solution("dafnvzed")` 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": "dafnvzed"}, "ref_output": "d\u00abiwd\u00bba\u00abfen\u00bbv\u00abzye\u00bbd\u00abw\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'di'), func_15('weywm'))", "funcname": "main_solution"}
rule