#include <bits/stdc++.h>
using namespace std;
typedef long long ll; typedef long double ld;
typedef  vector<int> vi; typedef  vector<ll> vl; typedef  vector<bool> vb;
typedef  vector<double> vd;
typedef  vector<vd> vvd;
#define REP(i,n) for(ll i=0; i < (n); ++i)
#define FOR(i,s,e) for (ll i = s; i < (ll)e; i++)
#define TEN(x) ((ll)1e##x)
#define ALL(v) (v).begin(), (v).end()

int main() {
#ifdef _WIN32
	ifstream cin("sample.in");
	ofstream cout("sample.out");
#endif
	cin.tie(0); // cinとcoutの連携を切る
	ios_base::sync_with_stdio(false);
	cout << fixed << setprecision(50);
	ll a, b; cin >> a >> b;
	cout << (a < b ? "K" : "S") << endl;
}