#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.14159265359;
ll inf=80010010010010010;
ll mod=998244353;
int main(){
    ll a,b;
    cin >> a >> b;
    if (a<b)
    {
        cout << "K" << endl;
    }else{
        cout << "S" << endl;
    }
    
}