

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 CO, and your holding is [King of Heart and Queen of Heart].
Before the flop, HJ raise 2.0 chips, CO raise 6.5 chips, and HJ call. Assume that all other players that is not mentioned folded.
The flop comes Jack Of Spade, Eight Of Diamond, and Three Of Club, then HJ check, CO bet 3 chips, and HJ call.
The turn comes Nine Of Diamond, then HJ bet 12 chips.


Now it is your turn to make a move.
To remind you, the current pot size is 32.0 chips, and your holding is [King of Heart and Queen of Heart].

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: