#include <iostream>
using namespace std;
int main()
{
    const int max_words = 31;
    const int max_lenght = 6;

    char **words = new char *[max_words];
    for (int i = 0; i < max_words; i++)
        words[i] = new char[max_lenght];
    cout << "Enter the string = ";

    int i_tmp = 0, j_tmp = 0, n_words = 0;
    char symbol = getchar();
    while (symbol != '.')
    {
        if (symbol == ',')
        {
            n_words++;
            words[i_tmp][j_tmp] = '\0';
            i_tmp++;
            j_tmp = 0;
        }
        else
        {
            words[i_tmp][j_tmp] = symbol;
            j_tmp++;
        }
        symbol = getchar();
    }
    words[i_tmp][j_tmp] = '\0';
    n_words++;

    cout << endl << "Words:" << endl;
    for (int i = 0; i < n_words; i++)
    {
        cout << i + 1 << ") ";
        for (int j = 0; words[i][j] != '\0'; j++)
        {
            cout << words[i][j];
        }
        cout << endl;
    }

    cout << endl << "Result:" << endl;
    for (int i = 0; i < n_words; i++)
    {
        bool is_correct = true;
        for (int j = 0; j < i; j++)
            if (tolower(words[j][0]) >= tolower(words[i][0]))
            {
                is_correct = false;
                break;
            }
        if (is_correct)
        {
            for (int j = i + 1; j < n_words; j++)
                if (tolower(words[j][0]) <= tolower(words[i][0]))
                {
                    is_correct = false;
                    break;
                }
            if (is_correct)
            {
                for (int j = 0; words[i][j] != '\0'; j++)
                    cout << words[i][j];
                cout << endl;
            }
        }
    }

    return 0;
}