#include <bits/stdc++.h>
using namespace std;
int main(){
	int x[7],f[7],i;
	for (i=1;i<=7;++i){
		cin>>x[i]; 
		cin>>f[i];
	}
	for (i=1;1<=7;++i) {
		if (x[i]+f[i]>8) cout<<i;
	}
	return 0;
}