You are given a code:

def main_solution(x):
    return (func_20('dlkhh', 'jwmffs') + func_15('lhfkm'))

Can you predict the output of `main_solution("mrskybe")` 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": "mrskybe"}, "ref_output": "djlwkmhfhfs\u00abl\u00bb\u00abh\u00bb\u00abf\u00bb\u00abk\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return (func_20('dlkhh', 'jwmffs') + func_15('lhfkm'))", "funcname": "main_solution"}
rule