निम्नलिखित अक्षर और प्रतीक श्रृंखला को देखिए और उसके बाद आने वाले प्रश्न का उत्तर दीजिए। गणना केवल बाएं से दाएं की जानी है। (बायें) D & @ L @ £ O & O G W © H N £ B € K Y & O Y (दायें) ऐसे कितने अक्षर हैं जिनमें से प्रत्येक के ठीक पहले एक प्रतीक है और ठीक बाद में भी एक प्रतीक है?

Refer to the given number and symbol series and answer the question that follows. Counting is to be done from left to right only. All numbers are single-digit numbers. (Left) $ 9 $ 6 7 8 £ 5 1 8 2 £ 9 3 4 6 9 # 8 8 7 7 (Right) How many such numbers are there, each of which is immediately preceded by a symbol and also immediately followed by a symbol?

This question is based on the given words: DEN KIF BUN CAR In each of the words, each vowel is changed to the letter immediately following it in the English alphabetical order and each consonant is changed to the letter immediately preceding it in the English alphabetical order. In how many letter-clusters thus formed, will no vowel appear?