using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;

class Magatro
{
  static long A,B;
    static void Main()
    {
        string[] S = Console.ReadLine().Split(' ');
        A = long.Parse(S[0]);
        B = long.Parse(S[1]);
        if (A < B)
        {
            Console.WriteLine("K");
            return;
        }
        Console.WriteLine("S");
    }


}