#include <stdio.h>
#include <locale.h>
#include <string.h>
#include <Windows.h>
#include <conio.h>

const UCHAR N_MAX_SYMBOLS = 9, N_MAX_WORDS = 50;

UCHAR is_palindrome(char* str);
UCHAR is_equal(char* str, char* last_str);

int main()
{
   setlocale(LC_CTYPE, "Russian");

   char word_sequence[N_MAX_WORDS][N_MAX_SYMBOLS], upd_word_sequence[N_MAX_WORDS][N_MAX_SYMBOLS], cnt_symbol = -1;
   UCHAR cnt_word = 0, upd_cnt_word = 1, temp = '\0';

   printf_s("Введите последовательность слов: \n");
   do
   {
      cnt_symbol++;
      scanf_s("%c", &temp);

      if (temp == ' ' || temp == '.')
      {
         word_sequence[cnt_word][cnt_symbol] = '\0';
         cnt_symbol = -1;
         cnt_word++;
      }
      else
         word_sequence[cnt_word][cnt_symbol] = temp;

   } while (temp != '.');
   word_sequence[cnt_word][0] = '\0';

   for (UCHAR i = 0; i < cnt_word; i++)
      if (!is_equal(word_sequence[i], word_sequence[cnt_word - 1]) && is_palindrome(word_sequence[i]))
      {
         strcpy_s(upd_word_sequence[upd_cnt_word], word_sequence[i]);
         upd_cnt_word++;
      }
   upd_cnt_word--;

   printf_s("Преобразованная последовательность: \n");
   for (unsigned char i = 0; i < upd_cnt_word - 1; i++)
      printf_s("%s ", upd_word_sequence[i]);
   if (upd_cnt_word > 0)
      printf_s("%s.", upd_word_sequence[upd_cnt_word]);
   else
      printf_s("Преобразованная последовательность пуста!");

   _getch();
   return 0;
}

UCHAR is_palindrome(char* str)
{

   for (unsigned char i = 0; i < strlen(str) / 2; i++)
   {
      if (str[i] != str[strlen(str) - i - 1])
         return 0;
   }
   return 1;
}

UCHAR is_equal(char* str, char* last_str)
{
   if (strlen(str) == strlen(last_str))
   {
      for (unsigned char i = 0; i < strlen(str); i++)
         if (str[i] != last_str[i])
            return 0;
   }
   else return 0;

   return 1;
}