nl50sh, stars, give an unkown a range for betting the river

[skibbel]

Villian 15 hands only, hasnt been very active, hasn't done anything stupid so far.

I think my stack is wrong, it shold be 58$.

MP ($32.15)
CO ($82.75)
Hero ($68.60)
SB ($55.15)
BB ($31.45)
UTG ($69.35)

Preflop: Hero is Button with XX.
UTG raises 2$, MP calls $2, <font color="#666666">1 fold</font>, Hero calls $2, <font color="#666666">1 fold</font>, BB calls $1.50.

Flop: ($6.25) K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG checks, <font color="#CC3333">MP bets $2.5</font>, <font color="#CC3333">Hero raises to $10.25</font>, BB folds, UTG calls $10.25, MP folds.

Turn: ($29.25) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, Hero checks.

River: ($29.25) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG bets 22.50$

Plz give him a tight and a semitight range, which can i stove with.

I don't post my toughts, cause i don't want to influence your opionion.