Team Burpee Pullup Pyramid Workout

In teams of two, one after the other, complete the following for time:

1 burpee pullup each
2 burpee pullups each
3 burpee pullups each
... all the way up to...
8 burpee pullups each
9 burpee pullups each
10 burpee pull ups each
9 burpee pullups each
8 burpee pull ups each
...all the way back down to...
3 burpee pull ups each
2 burpee pull ups each
1 burpee pull up each