

You are a specialist in playing 6-handed No Limit Texas Holdem. The following will be a game scenario and you need to make the optimal decision.

Here is a game summary:

The small blind is 0.5 chips and the big blind is 1 chips. Everyone started with 100 chips.
The player positions involved in this game are UTG, HJ, CO, BTN, SB, BB.
In this hand, your position is BB, and your holding is [Eight of Spade and Seven of Club].
Before the flop, HJ raise 2.0 chips, and BB call. Assume that all other players that is not mentioned folded.
The flop comes Ace Of Diamond, Eight Of Diamond, and Three Of Diamond, then BB check, HJ bet 1 chips, and BB call.
The turn comes Nine Of Diamond, then BB check, HJ bet 8 chips, BB raise 23 chips, and HJ call.
The river comes Ace Of Heart, then BB check, and HJ bet 39 chips.


Now it is your turn to make a move.
To remind you, the current pot size is 90.0 chips, and your holding is [Eight of Spade and Seven of Club].

Decide on an action based on the strength of your hand on this board, your position, and actions before you. Do not explain your answer.
Your optimal action is: