#include <iostream>
using namespace std;
int main() {
int a, b;
cin >> a >> b;
bool PoI = false;
if((a+b)%2 == 0){
PoI = true;
}
if((a-b)%2 == 0){
PoI = true;
}
if((a*b)%2 == 0){
PoI = true;
}
if(PoI == true){
cout << "s\n";
}else{
cout << "n\n";
}
return 0;
}
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