Who wins when two players have a flush? 

For example, say the first player also has two pair, one in their hand (two 3's), and one on the board (two 8's). The second player has `AQ`, with the same pair on the board (two 8's). Player one completes the flush with one of the threes in their hand. Player two completes the flush with the ace in their hand. The highest card in the flush on the board is a Jack.