0
in a Bb x bb cross?
Bb, Bb, C, Bb, Eb, D
Bb, Bb, C, Bb, F, Eb
Bb, Bb, Bb(up an octave), G, Eb, D, C
Ab, Ab, G, Eb, F, Eb
Bb Bb C Bb Eb D Bb Bb C Bb F Eb Bb Bb Bb G Eb D C Ab Ab G Eb F Eb
BB. Bb
Bb. bb
a, a, a, a, a, a, a, c, f, g, a,
bb, bb, bb, bb, bb, a, a, a, a, g, g, g, a, g, c
bb, bb, bb, bb, bb, a, a, a, a, c, c, bb, g, f.
The key is F Major