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F Diminished :: F A♭ B

A
E
C
G
F
♭3
♭5
♭3
♭5
F
♭5
F
♭3
F
♭3
♭5
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⬤ ⬤
A♭ B
B Major 6th :: B D♯ F♯ G♯

A
E
C
G
6
B
5
3
6
B
3
5
B
6
3
5
6
3
B
5
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⬤ ⬤