#include  <iostream>
#include  <algorithm>
#include  <climits>
#include  <string>

using namespace std;

#define rep(i, n) for(int i = 0; i < n; i++)
#define lrep(i, n, m) for(int i = n; i < m; i++)

typedef long long ll;
const int MAX = INT_MAX;


int main()
{	
	ll a, b;
	cin >> a >> b;

	if (a >= b)  cout << "S" << endl;
	else  cout << "K" << endl;
}