using System;
public class Program
{
    public static void Main()
    {
        var line = Console.ReadLine().Split(' ');
        var a = long.Parse(line[0]);
        var b = long.Parse(line[1]);
        if (a < b)
        {
            Console.WriteLine("K");
        }
        else
        {
            Console.WriteLine("S");
        }
    }
}