#include<bits/stdc++.h>
using namespace std;
int a[15],b[15],aa,bb,cc,dd,ee,ff,gg;
int main(){
	for(int i=1;i<=7;++i){
		cin>>a[i]>>b[i];
	}
	for(int i=1;;){
		if(i==1){
		aa=a[i]+b[i];
		}
		i++;
		if(i==2){
		bb=a[i]+b[i];
		}
		i++;
		if(i==3){
		cc=a[i]+b[i];
		}
		i++;
		if(i==4){
		dd=a[i]+b[i];
		}
		if(i==5){
		ee=a[i]+b[i];
		}
		i++;
		if(i==6){
		ff=a[i]+b[i];
		}
		i++;
		if(i==7){
		gg=a[i]+b[i];
		}
		break;
	}
	if(aa>8&&aa>=bb&&aa>=cc&&aa>=dd&&aa>=ee&&aa>=ff&&aa>=gg){
		cout<<"1";
		return 0;
	}
		if(bb>8&&bb>=aa&&bb>=cc&&bb>=dd&&bb>=ee&&bb>=ff&&bb>=gg){
		cout<<"2";
		return 0;
	}
		if(cc>8&&cc>=aa&&cc>=bb&&cc>=dd&&cc>=ee&&cc>=ff&&cc>=gg){
		cout<<"3";
		return 0;
	}
		if(dd>8&&dd>=aa&&dd>=bb&&dd>=cc&&aa>=ee&&aa>=ff&&aa>=gg){
		cout<<"4";
		return 0;
	}
		if(ee>8&&ee>=aa&&ee>=bb&&ee>=cc&&ee>=dd&&ee>=ff&&ee>=gg){
		cout<<"5";
		return 0;
	}
		if(ff>8&&ff>=aa&&ff>=bb&&ff>=cc&&ff>=dd&&ff>=ee&&ff>=gg){
		cout<<"6";
		return 0;
	}
		if(gg>8&&gg>=bb&&gg>=cc&&gg>=dd&&gg>=ee&&gg>=ff&&aa<=gg){
		cout<<"7";
		return 0;
	}
	cout<<"0";
	return 0;
}