using System;
using System.Collections.Generic;
using System.Linq;

namespace yukicoder
{
    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");
            }
        }
    }
}