#include <string>
#include <iostream>
using namespace std;
int T;
string bugText;
int lineEnds;
bool bugComplete(string text)
{
if (text.size() != bugText.size())
return false;
int i = text.size() -1;
return text[i] == bugText[i];
//return text == bugText;
}
bool bugStart(char ch)
{
if (ch == bugText[0])
return true;
return false;
}
bool bugFailed(string text)
{
if (text.size() > bugText.size())
return true;
for (int i = text.size() -1 ; i >= 0; --i)
{
if (text[i] != bugText[i])
return true;
}
return false;
}
string readBug()
{
string text;
while (lineEnds < T)
{
char ch;
ch = cin.get();
if (ch == '\n')
{
//cout << "endl" << endl;
lineEnds++;
text += ch;
continue;
}
if (bugStart(ch))
{
//cout << "bugstart" << endl;
if (text.empty())
text += ch;
else
{
cin.unget();
text += readBug();
}
}
else
{
//cout << "check bug" << endl;
text += ch;
if (bugComplete(text))
{
//cout << "bug complete!!" << endl;
return "";
}
if (bugFailed(text))
return text;
}
}
return text;
}
string baseLoop()
{
string text;
while (lineEnds < T)
{
char ch;
ch = cin.get();
if (ch == '\n')
{
// cout << "endl" << endl;
lineEnds++;
text += ch;
continue;
}
if (bugStart(ch))
{
//cout << "bugstart" << endl;
cin.unget();
text += readBug();
}
else
text += ch;
}
return text;
}
int main()
{
while (true)
{
cin >> T;
cin >> bugText;
if (!cin.good())
{
break;
}
lineEnds = 0;
char ch;
ch = cin.get();
if (ch != '\n')
cin.unget();
cout << baseLoop() << endl;
}
}