#include<stdio.h>
#include<string.h>
#define MAX 10
char back[101][75] , ahead[101][75] ;
char URL[75];
int bt = 0 , at = 0 ;
void push( char stack[101][75] ,int &top){
	strcpy(stack[++top] , URL) ;
}
int pop(char stack[101][75] , int &top){
	strcpy(URL , stack[top--])  ;
	return 1 ;
}
void dvisit(){
	push(back , bt) ;
	scanf("%s" ,URL) ;
	at = 0 ;
	printf("%s\n" , URL) ;
	}
void dback(){
	if(!bt)
		printf("Ignored\n") ;
	else{
		 push(ahead , at) ;
		 pop(back , bt) ;
		 printf("%s\n" , URL) ;
		}
	}
void forword(){
	if(!at)
		printf("Ignored\n") ;
	else{
		push(back , bt) ;
		pop(ahead , at) ;
		printf("%s\n" , URL) ;
		}
	}
int trans(char cmd[MAX]){
	if(!strcmp(cmd , "VISIT"))
	return 1 ;
	if(!strcmp(cmd , "BACK"))
	return 2 ;
	if(!strcmp(cmd , "FORWARD"))
	return 3 ;
	if(!strcmp(cmd , "QUIT"))
	return 0 ;
	else
	return 0 ;
}
int docmd(int c){
	switch(c){
		case 1 : dvisit() ;return 1 ;
		case 2 : dback() ;return 2 ;
		case 3 : forword() ; return 3 ;
		case 0 : return 0 ;
		}
	return 0 ;
}
int main()
{
	char cmd[MAX] ; 
	strcpy(URL , "http://www.acm.org/") ;
	while(scanf("%s" , cmd) , docmd(trans(cmd))) ;
	return 0 ;
}