#include<iostream>
#include<string>
#include<stack>
using namespace std;
stack <unsigned long long>fish;
string a;
unsigned long long n,m,s;
int main() {
	std::cin.tie(0);
  	std::ios::sync_with_stdio(false);
	cin>>n;
	while(n--){
		cin>>m;
		for(int j=1;j<=m;j++){
			cin>>a;
			if(a=="push"){
				cin>>s;
				fish.push(s);
			}else if(a=="pop"){
				if(fish.empty()){
					cout<<"Empty"<<endl;
				}else{
					fish.pop();
				}
				
			}else if(a=="query"){
				if(fish.empty()){
					cout<<"Anguei!"<<endl;
				}else{
					cout<<fish.top()<<endl;
				}
			}else if(a=="size"){
				cout<<fish.size()<<endl;
			}
		}
	}
	return 0;
}