#include <iostream>
#include <string>
#include <cstdlib>
#include <cstdio>
#include <algorithm>
#include <vector>
 
using namespace std;
 
typedef vector<string> Text;
 
bool can_be_grouped(const string&, const string&);
 
int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
 
    Text my_text;
 
    string cur_word;
   
    while(cin >> cur_word)
        my_text.push_back(cur_word);
   
 
    sort(my_text.begin(), my_text.end());
   
    int group_index = 1;
 
    string prev_word;
    prev_word = my_text[0];
 
    cout << "Group #" << group_index << endl
            << prev_word << endl;
 
    for(size_t i = 1; i < my_text.size(); ++i)
    {
        if(can_be_grouped(prev_word, my_text[i]))
            cout << my_text[i] << endl;
        else
            cout << "Group #" << ++group_index << endl
                << my_text[i] << endl;
 
        prev_word = my_text[i];
    }
 
    return 0;
}
 
bool can_be_grouped(const string& str1, const string& str2)
{
    return  ((str1[0] == str2[0]) && (str1[1] == str2[1]) && (str1[2] == str2[2]));
}