#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
    int T;
    cin>>T;
    while (T--){
    	int n;
    	cin>>n;
    	stack<int> s;
    	for (int i=1;i<=n;i++){
    		string t;
    		cin>>t;
    		if (t=="push"){
    			int y;
    			cin>>y;
    			s.push(y);
			}
			else if (t=="pop"){
				if (s.size()==0) cout<<"Empty\n";
				else s.pop();
			}
			else if (t=="query"){
				if (s.empty()) cout<<"Anguei!\n";
				else cout<<s.top()<<"\n";
			}
			else {
				cout<<s.size()<<"\n";
			}
		}
	}
	return 0;
}