#include <iostream>
#include <cstdio>
#include <set>
using namespace std;
set<pair<int,int> >s;
inline void read(int &x){
	x=0;
	bool flag=0;
	char c=getchar();
	while(c<'0'||c>'9'){
		if(c=='-')
			flag=1;
		c=getchar();
	}
	while(c>='0'&&c<='9'){
		x=(x<<3)+(x<<1)+c-'0';
		c=getchar();
	}
	if(flag)
		x=-x;
}
int main(){
	freopen("loverfinding.in","r",stdin);
	freopen("loverfinding.out","w",stdout);
	int n,X0,Y0,xt,yt;
	int x,y;
	int ans=1;
	read(n),read(X0),read(Y0),read(xt),read(yt);
	s.insert(make_pair(X0,Y0));
	for(int i=1;i<=n;i++){
		read(x),read(y);
		X0+=x,Y0+=y;
		if(s.find(make_pair(X0,Y0))==s.end()){
			ans++;
			s.insert(make_pair(X0,Y0));
		}
		if(X0==xt&&Y0==yt)
			break;
	}
	if(s.find(make_pair(xt,yt))==s.end())
		printf("SingleDogMZX\n");
	else printf("%d\n",ans);
return 0;
}