import java.io.*;
import java.util.*;

public class Exercise60{
  public static void main (String[] args) throws IOException{

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String str = new String(in.readLine());

    String[] strArray = str.split(" ");

    long a = Long.parseLong(strArray[0]);
    long b = Long.parseLong(strArray[1]);

    if (b > a){
      System.out.println("K");
    }else{
      System.out.println("S");
    }
  }
}