#include <iostream>
#include <vector>
using namespace std;
int main(){
vector<string> urls;
urls.push_back("http://www.acm.org/");
int idx = 0;
string cmd;
while (true) {
cin >> cmd;
if (cmd == "QUIT") return 0;
else if (cmd == "VISIT") {
for (int i=urls.size()-1; i>idx; i--) {
urls.pop_back();
}
string url;
cin >> url;
urls.push_back(url);
idx++;
}
else if (cmd == "BACK"){
if (idx <= 0) {
cout << "Ignored" << endl;
continue;
}
idx--;
}
else if (cmd == "FORWARD") {
if (idx >= urls.size()-1) {
cout << "Ignored" << endl;
continue;
}
idx++;
}
cout << urls[idx] << endl;
}
return 0;
}