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