#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <map>
using namespace std;
int read(){
	int x=0,f=1;char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-') f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9')x=x*10+ch-48,ch=getchar();
	return x*f;
}
typedef pair<int,int>pa;
map<pa,int>m;
int main(){
	freopen("loverfinding.in","r",stdin);freopen("loverfinding.out","w",stdout);
	int n=read(),x0=read(),y0=read(),x1=read(),y1=read();
	m[make_pair(x0,y0)]=1;
	int cnt=1;
	for(int i=1;i<=n;i++){
		int x=read(),y=read();
		x0+=x,y0+=y;
		if(x0==x1&&y0==y1){
			cnt++;printf("%d\n",cnt);
			return 0;
		}
		if(m[make_pair(x0,y0)]==1)continue;
		m[make_pair(x0,y0)]=1;
		cnt++;
	}
	printf("SingleDogMZX\n");
	fclose(stdin);fclose(stdout);
	return 0;
}