#include<iostream>
#include<string>
#define maxn (int)(1e6)

typedef unsigned long long ull;

using namespace std;

int top=-1,T,n;
ull s[maxn]={},x;
string op;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	
	cin>>T;
	
	while(T--)
	{
		cin>>n;
		
		while(n--)
		{
			cin>>op;
			
			if(op=="push")
			{
				cin>>x;
				
				s[++top]=x;
			}
			
			else if(op=="pop")
			{
				if(top==-1)
					cout<<"Empty"<<endl;
				
				else
					top--;
			}
			
			else if(op=="query")
			{
				if(top==-1)
					cout<<"Anguei!"<<endl;
				
				else
					cout<<s[top]<<endl;
			}
			
			else if(op=="size")
				cout<<top+1<<endl;
		}
		
		top=-1;
	}
	
	return 0;
}