stronglift 5X5

Workout A Workout B
Squat 5x5 Squat 5x5
Bench Press 5x5 Overhead Press 5x5
Inverted Rows 3xF Deadlift 1x5
Push-ups 3xF Pull-ups/Chin-ups 3xF
Reverse Crunch 3x12 Prone Bridges 3x30sec

i really don't understand this, do i do workout A then do workout B on the same workout? or is it workout A for the first week then workout B on the second week.
can someone explain this to me??
heres the link http://stronglifts.com/stronglifts-5x5- ... g-program/

Alternate workout A & B each session. Most people train Mo/We/Fr or Tu/Th/Su or Sa/Tu/Th. Always take at least 48 hours rest between 2 workouts. Alternate Pull-ups & Chin-ups each workout B.

Wk 1M a
Wk 1W b
Wk 1F a
Wk 2M b
Wk 2W a
Wk 2F b