#include<bits/stdc++.h>

using namespace std;
#define int long long
const int N = 1e6 + 5;

int t, n, x;
string s;
stack<int>p;
signed main() {
	cin >> t;
	while(t--) {
		cin >> n;

		while(n--) {
			cin >> s;
			if(s == "push") {
				cin >> x;
				p.push(x);
			}
			if(s == "pop") {
				if(p.empty())
					cout << "Empty" << endl;
				else
					p.pop();
			}
			if(s=="query") {
				if(p.empty())
					cout << "Anguei!" << endl;
				else
					cout << p.top()<< endl;
			}
			if(s =="size")
				cout << p.size() << endl;
		}
		while(!p.empty())
			p.pop();
	}
	return 0;
}