#include<iostream>
#include<vector>
#include<string>
using namespace std;

int main(){
	int i=0,j=0,sum=0;
	vector<string> sb(1000);
	vector<string> sf(1000);
	sb[0]="http://www.acm.org/";
	string a;
	while(cin >>a&&a!="QUIT"){
		if(a=="VISIT"){
			cin >>a;i++;
			sb[i]=a;
			sf[j]=a;j++;
			if(sum<=j) sum=j;
			cout <<a<<endl;
		}
		else if(a=="BACK"){
            i--;j--;
			if(i<0) {cout<<"Ignored"<<endl;i=0;}
			else cout<<sb[i]<<endl;
		}
		else if(a=="FORWARD"){	
			if(j<0) j=0;
			if(j>=sum) {cout<<"Ignored"<<endl;j=sum;}
			else {i++;sb[i]=sf[j];j++;cout <<sb[i]<<endl;}
		}
	}
	return 0;
}