CrossFit Open 17.2

Open 17.2
Complete as many rounds and reps as possible in 12 minutes of:
2 rounds of:
  50-ft. weighted Walking Lunge
  16 Toes-to-Bar
  8 Dumbbell Clean
Then, 2 rounds of:
  50-ft. weighted walking lunge
  16 Bar Muscle up
  8 Dumbbell Clean
Etc., alternating between toes-to-bars and bar muscle-ups every 2 rounds.
use 50 / 35-lb. dumbbells

Recovery:
​Row 500 Meters
10-1 GHD Sit Ups
Back Extensions