#include <iostream>
#include <vector>

using namespace std;

string backspace(string tekst)
{
    if(tekst == "")
        return tekst;
    string wynik = "";
    unsigned n = tekst.size() - 1;
    for(unsigned i = 0; i < n; ++i)
        wynik += tekst[i];
    return wynik;
}

char litera_ostatniego_slowa(vector<string> wektor)
{
    string slowo = wektor[wektor.size() - 1];
    if(slowo == "")
        return '.';
    return slowo[slowo.size() - 1];
}

int main()
{
    int n;
    cin>>n;
    int ile;
    string s;
    char h;
    vector<string> slowa;
    slowa.push_back("");

    for(int i = 0; i < n; ++i)
    {
        cin >> s;
        if(s == "dopisz")
        {
            cin >> h;
            s = slowa[i] + h;
        }
        else if(s == "backspace")
            s = backspace(slowa[i]);
        else
        {
            cin >> ile;
            s = slowa[i - ile];
        }
        slowa.push_back(s);
        cout << litera_ostatniego_slowa(slowa) << endl;
    }
    cout << slowa[slowa.size() - 1];
    return 0;
}