#include<bits/stdc++.h>
 using namespace std;
#define INF 1000000000
#define REP(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
int main(){
    long long A,B;
    cin>>A>>B;
    if(A>=B){
       cout<<"S"<<endl;
    }else{
       cout<<"K"<<endl;
    }
}