import java.util.Scanner;

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