import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int A = sc.nextInt();
		int B = sc.nextInt();
		sc.close();
		
		if(A<B){
			System.out.println("K");
		}else{
			System.out.println("S");
		}
		
	}
}