#include"stdio.h"
#include"string.h"
int main()
{
	char url[200][100],a[10];int i;
	i=0;
	memset(url,'a',sizeof(url));
	strcpy(url[0],"http://www.acm.org/");
	while(1)
	{ 
		scanf("%s",a);
		if(strcmp(a,"VISIT")==0)
			{
				i++; 
				scanf("%s",url[i]);
				printf("%s\n",url[i]);
			}
		if(strcmp(a,"BACK")==0)
		{
			i--;
			if(i>=0)
				printf("%s\n",url[i]);
			else
				printf("Ignored\n");
			if(i<0) i=0;
		}
		if(strcmp(a,"FORWARD")==0)
		{
			i++;
			if(url[i][0]!='a')
				printf("%s\n",url[i]);
			else
			{
				printf("Ignored\n");
				i--;
			}
		}
		if(strcmp(a,"QUIT")==0)
			break;

	}
}