| 4, atleast to start with.
2 upper and 2 lower.
remember, since only working each part 2 times a week, you will need more than just one push and one pull, etc.
Pullups, chinups, pulldowns
push press, military press,
back squat, front squat, overhead squat, bulgarian squat
conventional deads, romanian deads
bench press, DB bench press, pushups, bent over rows, cable rows,
I'm not suggesting all of those each day, just throwing out suggestions for exercises. | 
