AKA: A∅, A1/2dim, A1/2dim7, A7°5, A7b5, A Half-diminished, Am7(-5), Am7°5, Am7b5, Amin7dim5, A minor seventh flat fifth, A minor seventh flat five, Aø, Aº7
You can choose to play the bass (circled in green) or the counter bass (circled in blue). I prefer playing the bass but both positions are quite comfortable.
Notes:
A, C, E♭, G
Intervals:
R, m3°, m5°, m7°
Left hand:
A + Cm
Fingering:
2 + 4 or 3 + 5
or 4 + 2 on counter-bass