#include <iostream>
#include <cstdio>
#include <cassert>
#include <cstring>
#include <vector>
#include <valarray>
#include <array>
#include <queue>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <algorithm>
#include <cmath>
#include <complex>
#include <random>

using namespace std;
using ll = long long;
using ull = unsigned long long;
constexpr int TEN(int n) {return (n==0)?1:10*TEN(n-1);}

bool solve(ll a, ll b) {
    if (b > a) return false;
    return true;
}
int main() {
    ll a, b;
    cin >> a >> b;
    if (solve(a, b)) {
        cout << "S" << endl;
    } else {
        cout << "K" << endl;
    }
    return 0;
}