#include<bits/stdc++.h>
using namespace std;
unsigned long long z[10000001],n,m,T;
char s[10];
int main(){
	cin>>T; 
	while(T--){
		scanf("%d",&n);
		unsigned long long top=0;
		for(int i=1;i<=n;i++){
			
			
			scanf("%s",s);
			if(strcmp(s,"push")==0){
				unsigned long long x;
				scanf("%llu",&x);
				z[++top]=x;
			}				
			else if(strcmp(s,"pop")==0){
				if(top==0) puts("Empty");
				else top--;
			}
			else if(strcmp(s,"query")==0){
				if(top==0) puts("Anguei!");
				else printf("%llu\n",z[top]);
			}
			else printf("%llu",top);
		}
	} 
	return 0;
}