Table:
text: Dominant seventh chord
Dominant seventh chord table
Dominant seventh chord table
Chord Root Major_Third Perfect_Fifth Minor_Seventh_
C7 C E G B♭
C♯7 C♯ E♯ (F) G♯ B
D♭7 D♭ F A♭ C♭ (B)
D7 D F♯ A C
D♯7 D♯ F (G) A♯ C♯
E♭7 E♭ G B♭ D♭
E7 E G♯ B D
F7 F A C E♭
F♯7 F♯ A♯ C♯ E
G♭7 G♭ B♭ D♭ F♭ (E)
G7 G B D F
G♯7 G♯ B♯ (C) D♯ F♯
A♭7 A♭ C E♭ G♭
A7 A C♯ E G
A♯7 A♯ C (D) E♯ (F) G♯
B♭7 B♭ D F A♭
B7 B D♯ F♯ A

Question: What is the total number of 3rds you can do with a 7th form chord under a dominant 7th chord?