#include <bits/stdc++.h>
using namespace std;
int main()
{

	ios::sync_with_stdio(false);
	cin.tie(0);
	int T, n;
	for (cin >> T; T; --T)
	{
		stack<unsigned long long> stk;
		for (cin >> n; n; --n)
		{
			string s;
			cin >> s;
			if (s == "push")
			{
				unsigned long long x;
				cin >> x;
				stk.push(x);
			}
			else if (s == "pop")
			{
				if (stk.empty())
					cout << "Empty\n";
				else
					stk.pop();
			}
			else if (s == "query")
			{
				if (stk.empty())
					cout << "Anguei!\n";
				else
					cout << stk.top() << '\n';
			}
			else
			{
				cout << stk.size() << '\n';
			}
		}
	}
	return 0;
}