using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Text;
//using static CompLib.CompLib;
//using DataStructure;

namespace atcoder
{

    class Program
    {
        const int intMax = 1000000000;
        const long longMax = 2000000000000000000;
        static void Main(string[] args)
        {
            var AB = Console.ReadLine().Trim().Split().Select(long.Parse).ToArray();
            long A = AB[0];
            long B = AB[1];
            if (A < B)
            {
                Console.WriteLine("K");
            }
            else
            {
                Console.WriteLine("S");
            }
        }
    }
}