#include <bits/stdc++.h>
using namespace std ;
#define ll long long
int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll a,b;
  cin >> a >> b;
  if(a < b){
    cout << "K" << endl;
    return 0;
  }
  cout << "S" << endl;
  return 0;
}