Days of the week are represented as three-letter strings ("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"). Write a Java 8 solution that, given a string S representing the day of the week and an integer K (between 0 and 500), returns the day of the week that is K days later. For example, given S = "Wed" and K = 2, the function should return "Fri". Given S = "Sat" and K = 23, the function should return "Mon".