package yukicoder;
import java.util.Scanner;
public class Main{
	public static void main(String[] args){
		new Main().solve();
	}
	void solve(){
		Scanner sc=new Scanner(System.in);
		long A=sc.nextLong();
		long B=sc.nextLong();
		if(A<B){
			System.out.println("K");
		}else{
			System.out.println("S");
		}
	}
}