PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO ($81.30)
Button ($79.70)
SB ($99.50)
BB ($19.85)
Hero ($98.70)
MP ($103.80)

Preflop: Hero is UTG with A, K.
Hero raises to $4, MP calls $4, CO calls $4, Button calls $4, 2 folds.

Flop: ($17.50) 5, 2, 2 (4 players)
Hero checks, MP checks, CO bets $4, Button raises to $15, Hero ?