A person has to create a code. The code must contain exactly 7
letters. The first letter must either a N, P, R, or T. The second
letter must be a vowel that is not I, O, or U. The third letter
must be a consonant that is not a D, F, H, or J. The fourth letter
must be a vowel that is not an O or U. The fifth letter must be a
consonant that is not a...