Need help with cooling fans

[andredn.sp]

hi guys i got some problem with my case's cooling fans. My case has 4 slots for 120mm fans : one in the back and three in the front. So now i try to install those fans in but kinda lost because i dont know which one gonna be the intake and which gonna be the exhaust. Plz help

 

[clutchc]

The rule of thumb for mid tower/tower cases is...
Intake: front, side, bottom
Exhaust: top, rear.