#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main()
{
    vector<string*> document;
    string input;

    cin >> input;
    document.push_back(new string(input));

    while(input != "Q")
    {
        cin >>  input;
        int docsize = document.size();
        for(int i = 0; i < docsize; i++)
        {
            if(*document[i] == input)
            {
                document.push_back(document[i]);
                break;
            }
            else
            {
                document.push_back(new string(input));
                break;
            }
        }
    }
}