#include"bits/stdc++.h"
using namespace std;
int main() {
    int a[10001],s=0;
    for(int i=1;i<=14;i+=2){
        for(int j=1;j<=14;j+=2){
            s+=1;
            scanf("%d\n",&a[i]);
            scanf("%d\n",&a[j]);
            if(a[i]+a[j]>8){
                cout<<s;
            break;}
        }return 0;}
        cout<<0;
    return 0;
}