#include<bits/stdc++.h>
using namespace std;
vector<int> a;
signed main(){
	unsigned long long t=0;
	cin>>t;
	while(t--){
		unsigned long long op=0;
		cin>>op;
		while(op--){
			string str;
			cin>>str;
			if(str=="push"){
				unsigned long long k=0;
				cin>>k;
				a.push_back(k);
			}else if(str=="pop"){
				if(a.empty()) cout<<"Empty"<<endl;
				else a.pop_back();
			}else if(str=="query"){
				if(a.empty()) cout<<"Anguei!"<<endl;
				else cout<<a.back()<<endl;
			}else{
				cout<<a.size()<<endl;
			}
		}
		 while(!a.empty()){
            a.pop_back();
         }
	}
	return 0;
}