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

class Program {
    static string ReadLine() { return Console.ReadLine(); }
    static int ReadInt() { return int.Parse(ReadLine()); }
    static int[] ReadInts() { return ReadLine().Split().Select(int.Parse).ToArray(); }
    static string[] ReadStrings() { return ReadLine().Split(); }

    static void Main() {
        var ab = ReadLine().Split().Select(long.Parse).ToArray();
        long a = ab[0], b = ab[1];
        Console.WriteLine(a < b ? "K" : "S");
    }
}