#include<bits/stdc++.h>
using namespace std;
string s;
int t;
int main(){
	scanf("%d",&t);
	while(t--){
		stack<unsigned long long>a;
		int n;scanf("%d",&n);
		while(n--){
			cin>>s;
			if(s=="push"){
				int r;
				scanf("%d",&r);
				a.push(r);
			}
			else if(s=="pop"){
				if(a.size()==0)	printf("Empty\n");
				else	a.pop();
			}
			else if(s=="query"){
				if(s.size()==0)	printf("Anguei!\n");
				else	cout<<a.top()<<endl;
			}
			else if(s=="size")	cout<<a.size()<<endl;
		}
	}
	return 0;
}//

求大佬调