The consonants in the word 'GETTOGETHER' are changed to the respective previous alphabets in the English alphabetical series and the vowels are changed to the respective alphabets succeeding them in the series. Any alphabet which is repeated in the word thus formed is eliminated i.e. if there is a letter X is repeated more than once then only one time X will be considered. How many pairs of letters in the word formed after arranging the remaining letters in alphabetical order have as many letters between them in the word (both forward and backward direction) as they have between them in the English alphabetical series?