Comprehension

Directions for questions: Read the information given below and answer the questions that follow :

A string of three English letters is formed as per the following rules :

(a) The first letter is any vowel.

(b) The second letter is m, n or p

(c) If the second letter is m then the third letter is any vowel which is different from the first letter

(d) If the second letter is n then the third letter is e or u.

(e) If second letter is p then the third letter is the same as the first letter

CAT/2003

Question . 32

How many strings of letters can possibly be formed using the above rules such that the third letter of the string is e?