(Vowel or consonant?) Write a program that prompts the user to enter a letter and check whether the letter is a vowel or consonant. For a nonletter input, display invalid input. Sample Run 1 Enter a letter: B B is a consonant Sample Run 2 Enter a letter grade: a a is a vowel Sample Run 3 Enter a letter grade: \# # is an invalid input Class Name: Exercise04_13 .

1. (Vowel or consonant?) Write a program that prompts the user to enter a letter and check whether
the letter is a vowel or consonant. For a nonletter input, display invalid input. Sample Run 1
Enter a letter: B B is a consonant Sample Run 2 Enter a letter grade: a a is a vowel Sample Run 3
Enter a letter grade: # # is an invalid input Class Name: Exercise04_13