import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        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');
        }

    }

}