Opponent is 45/7, donkish.

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

saw flop|saw showdown

BB ($200)
UTG ($553.99)
MP ($344.60)
CO ($222)
Hero ($337.15)
SB ($152.85)

Preflop: Hero is Button with J, A. UTG posts a blind of $2. SB posts a blind of $1.
2 folds, Hero raises to $8, 1 fold, UTG (poster) calls $6.

Flop: ($17) A, A, 6 (3 players)
UTG calls $551.99 (All-In), Hero ???