i should know what to do here...

[invisibleleadsoup]

...but sadly i don't.
party 100 f.o.

the only hand i played at the the table so far after getting moved about 20 hands ago,i have 4k,blinds 200/400,and i raise to 1200 in early position with AJ,big stack calls,shortstack goes all in for like 600 more,i push,big stack calls with 56 or something,shortstack has TT,i hit an A and am up to 10k..

so anyway,blinds 200/400,utg+2 makes it 1500,its folded to me on the button with 99
we both have about 10k,and i've no reads...what's the standard line here?