// PATn.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>

using namespace std;

int main()
{

    unsigned m, n, s;
    cin >> m >> n >> s;

    vector<string> data;
    for (unsigned i = 0; i < m; ++i)
    {
        string tmp;
        cin >> tmp;

        data.push_back(tmp);
    }

    vector<string> luck;
    for (unsigned i = s - 1; i < m; )
    {
        if(find(luck.begin(),luck.end(),data[i])==luck.end())
        {
            luck.push_back(data[i]);
            i = i + n;
        }
        else
        {
            i = i + 1;
        }
    }

    if (luck.size() == 0)
    {
        cout << "Keep going...";
    }
    else
    {
        for (size_t i = 0; i < luck.size(); ++i)
        {
            cout << luck.at(i);
            if (i != (luck.size() - 1))
                cout << endl;
        }
    }

    system("pause");
    return 0;
}