#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#include <atcoder/all>
using namespace atcoder;

#define REP(i, n) for(int i = 0; i < (int)n; i++)
#define LREP(i, n) for(LL i = 0; i < (LL)n; i++)
#define RREP(i, n) for(int i = (int)n-1; i >= 0; i--)
#define V(T) vector<T>

#define P pair<int, int>
#define LP pair<LL, LL>
#define T3 tuple<LL, LL, LL>
#define T4 tuple<LL, LL, LL, LL>
#define INF 1000000007
#define SIZE 500100
#define MOD 1000000007
typedef long long LL;

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

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