using System;
using System.Linq;
public class Program
{
    public static void Main()
    {
        var a = Console.ReadLine().Split(' ').Select(x => ulong.Parse(x)).ToArray();
        if (a[0] < a[1])
        {
            Console.WriteLine("K");
        }
        else
        {
            Console.WriteLine("S");
        }
    }
}