#include 

using namespace std;

int main() {
    
    int n;
    cin >> n;
    int m;
    cin >> m;
    
    int x = n / 10;
    int y = m / 10;

    int l = x % 10;
   
    int u = y % 10;
    cout << u + l << endl;
    return 0;
}