Little info about villain, he's playing 37/26 over 27 hands
I am wondering what would be the most profitable line on the river
[hand_history]Poker Stars, $0.50/$1 No Limit Hold'em Cash, 6 Players
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#13543602
BTN: $101.50 (101.5 bb)
Hero (SB): $104.23 (104.2 bb)
BB: $89.50 (89.5 bb)
UTG: $99.88 (99.9 bb)
MP: $40 (40 bb)
CO: $42 (42 bb)
Preflop: Hero is SB with K

K
UTG raises to $3, 3 folds,
Hero raises to $10,
BB folds, UTG calls $7
Flop: ($21) 8

7

A
(2 players)
Hero bets $10, UTG calls $10
Turn: ($41) T
(2 players)
Hero checks,
UTG bets $12, Hero calls $12
River: ($65) K
(2 players)
Hero ?