import java.util.*;


public class Main_yukicoder374 {

    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("S");
        } else {
        	System.out.println("K");
        }

        sc.close();
    }
}