using System;
//using static CompLib.CompLib;
//using DataStructure;

namespace atcoder
{

    class Program
    {
        static void Main(string[] args)
        {
            var AB = Console.ReadLine().Trim().Split().Select(ulong.Parse).ToArray();
            if (AB[0] < AB[1])
            {
                Console.WriteLine("K");
            }
            else
            {
                Console.WriteLine("S");
            }
        }
    }
}