#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <string>
#include <algorithm>
#include <iomanip>
using namespace std;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

	int A, B;
	cin >> A >> B;

	if(A <= B) {
		cout << "K" << endl;
	}
	else {
		cout << "S" << endl;
	}
}