You are given a code:

def main_solution(x):
    return func_20(func_15('lst'), func_5(x, 'dm'))

Can you predict the output of `main_solution("farkhwl")` 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": "farkhwl"}, "ref_output": "\u00abdlm\u00bbf\u00abasr\u00bbk\u00abhtw\u00bbl", "ref_code": "def main_solution(x):\n    return func_20(func_15('lst'), func_5(x, 'dm'))", "funcname": "main_solution"}
rule