import java.util.Scanner;

public class No374 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		long a = scanner.nextLong() , b = scanner.nextLong();
		scanner.close();
		
		if(a < b) {
			System.out.println("K");
		}else {
			System.out.println("S");
		}

	}

}