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#include<bits/stdc++.h>

using namespace std;

int main()

{

int T, pin = 1;

cin>>T;

for(int i = 1; i <= T; i++){

cout << "Case " << i <<":"<<endl;

stack <string> f;

stack <string> b;

string keyword, current = "http://www.lightoj.com/";

while(cin >> keyword && keyword != "QUIT"){

pin = 1;

if(keyword == "VISIT"){

b.push(current);

cin >> current;

f = stack <string> ();

}

if(keyword == "FORWARD"){

if(f.empty()){

pin = 0;

}

else{

b.push(current);

current = f.top();

f.pop();

}

}

if(keyword == "BACK"){

if(b.empty()){

pin = 0;

}

else{

f.push(current);

current = b.top();

b.pop();

}

}

if(pin){

cout<<current<<endl;

}

else{

cout<<"Ignored"<<endl;

}

}

}

return 0;

}