12 Button Accordion: #11 "D Minor" Jam

It's been a long time since I played this little fellow. I just started tapping out a "D Minor Seventh" chord, just to see what would happen.
There is NO "D Minor" chord button on this 12-button accordion, so I used a "D" BASS button with an "F Major" CHORD button. That gives me the tones D, F, A, C-the "D Minor Seventh." I just alternated between the "Dm7" and the "G Major" until I got bored and moved on.