In the word "CONSERVATIVE", each consonant is replaced by the letter that appears two places before it in the English alphabetical series, and each vowel is replaced by the letter that appears two places after it in the series. After replacing the letters, eliminate any duplicates, and arrange the remaining letters in alphabetical order. How many pairs of letters in the word formed have as many letters between them in the word (both forward and backward direction) as they have between them in the English alphabetical series?