PokerStars (8 handed) Hand History converter Courtesy of PokerZion.com

Preflop: Hero is SB with , , , . Hero posts a blind of 50.
UTG calls, 3 folds, CO calls, 1 fold, Hero (poster) completes, BB checks.

Flop: , , (4 players)
Hero checks, BB checks, UTG checks, CO bets, Hero calls, BB calls, UTG folds.

Turn: (3 players)
Hero bets, BB calls, CO calls.

River: (3 players)
Hero bets, BB folds, CO calls.

Final Pot:

Results in white below:
CO has 2d 3d 6s Ah (High: flush, king high).
Hero has 5s 5h 8h Kh (High: three of a kind, kings).
Outcome: CO wins .