package yukicoder;

import java.util.Scanner;

public class No374 {
    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");
        }
    }
}