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

int main()
{
	int i=0,j=0;
	char str[]="http://www.acm.org/";
	string back[100],s,forward[100];
	string current(str);
	while(cin>>s&&s!="QUIT")
	{
		if(s=="VISIT")
		{
			j=0;
			back[i++]=current;
			cin>>current;
			cout<<current<<endl;
		}
		else if(s=="BACK")
		{
			if(current.compare(str))
				forward[j++]=current;
			if(i>0)
			{
				current=back[--i];
				cout<<current<<endl;
			}
			else
				cout<<"Ignored"<<endl;
		}
		else if(s=="FORWARD")
		{
			back[i++]=current;
			if(j>0)
			{
				current=forward[--j];
				cout<<current<<endl;
			}
			else
				cout<<"Ignored"<<endl;
		}
	}
	return 0;
}