Workout

Warm-up (500)
400 swim
100 kick

Set (600)
4 x 50 Stroke on 1:00
4 x 50 free on :50
200 IM 
...25 drill/25 swim

Set (2000)
2 rounds
2 x 200 on 3:15
…last 50 non free
6 x 50 stroke on 1:00
2 x 150 on 2:45
…50 stroke, 50 Fr, 50 stroke

Cool-down (400)
200 kick
200 swim