From word COMPUTER with the help of second letter, fourth letter, sixth letter, and seventh letter make English meaningful words. And answer that what is the third letter in a new word, if more than one words are possible then give answer X and if no word is possible then give answer Y.

If the letters in each of the following four words are first rearranged in the alphabetical order then the meaningful words are formed from these groups of letters, and then they are rearranged as in a dictionary, which word would have its group of letters in the last among the four?

Word - BRAE, AEFR, LLKI, EEKP