Workout

Warm-Up (600)
300 swim, 200 drill
100 kick

Set (600)
4 x 150 on 2:30
...100 drill, 50 swim

Set (1500)
6 rounds
100 IM on 1:40
100 free on 1:30
50 easy on 1:20

Set (500)
Pull 500
...right breathing down
...left side breathing back

Cool-down (200) 
200 easy