script-case2

#!/bin/bash
echo -n "Enter a letter: "
read letter
case $letter in
    X)
        echo "$letter is an X"
        ;;
    [aeiou])
        echo "$letter is a vowel"
        ;;
    [0-9])
        echo "$letter is a digit, silly"
        ;;
    *)
        echo "The letter '$letter' is not supported"
        ;;
esac