Write a case construct that prints the word “vowel” if the value of the variable letter is a vowel (i.e., A, E, I, O, or U), prints the word “consonant” if the value of letter is any other letter of...

Write a case construct that prints the word “vowel” if the value of the variable letter is a vowel (i.e., A, E, I, O, or U), prints the word “consonant” if the value of

letter is any other letter of the alphabet, and prints an error message if it is any

other character.