#define num_of_words 20

int main(void)
{
    char* sorted_words[MAXLEN];

    for (int i = 0; i < num_of_words; ++i)
    {
        //find length of each word
        int len_of_word = strlen(sorted_words[i]);
        find_sub_string(sorted_words[i], len_of_word);

    }
return 0;
}

void find_sub_string(char string[], int n)
{
    for (int i = 0; i < n; i++)
    {
        for (int j = i+3; j < n; j++)
        {   /* print substring from i to j */
            for (int k = i; k <= j; k++)
            {
                //prints character by character
                printf("%c", string[k]);
            }
            printf("n");
        }
    }

}