Sing the Music Alphabet Three Different Ways

Sing the following letter combinations to the tune of "Twinkle Twinkle Little Star"

Forwards

A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G A B C D E F G

Backwards

G F E D C B A G F E D C B A G F E D C B A G F E D C B A G F E D C B A G F E D C B A

By Skips

A C E G B D F A C E G B D F A C E G B D F A C E G B D F A C E G B D F A C E G B D F