UTG bets 12bb

Multi-way River | 3-way: BTN | 100bb effective | Difficulty: Easy

Players in hand: UTG, Hero (BTN), BB

Hero hand

A♣K♣

Board

K♥8♦4♠2♣7♥

Action so far:
River 7♥, pot 20bb
UTG bets 12bb

Pot: 20bb   To call: 12bb

Villain range: UTG: KK,KQ,KJs,AQ,AJ,JJ,88,44,22,77

Your move: