short term loss vs. long term gain

Hello,

I have 2 trading account from two different brokerage:

Account A:  short term loss: -$3000; long term gain +$5000

Account B:  short term gain: +$4000

Question:

Would account A short term loss to offset account A long term gain first, or would account A short term loss to offset account B short term gain first?

Thanks!

Roger