#include
using namespace std;
int main(){
int n;
cin >> n;
char text[101] = {0};
int i = 0;
for (int count = 0; count < n; count++) {
char key[5];
cin >> key;
if (key[0] == '<' && key[1] == 'b' && key[2] == 's' && key[3] == '>') {
if (i > 0) {
i--;
text[i] = 0;
}
} else {
text[i] = key[0];
i++;
}
}
for (int j = 0; j < i; j++) {
cout << text[j];
}
cout << endl;
return 0;
}
