#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main()
{
    vector<string> my_strings;

    for (int i=0; i < 5; i++){
        cout << i << ": ";

        string s;
        getline(cin, s);
        my_strings.push_back(s);

        if (s.empty()){
            break;
        }
    }

    for (int i=0; i < my_strings.size(); i++){
        cout << my_strings[i] << "\n";
    }
}