#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;

int main()
{
	ll A, B;
	cin >> A >> B;

	if (A < B) {
		cout << "K" << endl;
	}else{
		cout << "S" << endl;
	}
  return 0;
}