To clear the victim's airway, you should:
Push chin down, tilt head back.
Lift chin up, turn head to the left.
Lift chin up, tilt head forward.
Lift chin up, tilt head back.
To keep the airway open perform the head-tilt, chin-lift. Place one hand on the victim's forehead and put the fingers of your other hand under the bony part of the chin. Press down on the forehead and lift out the chin so that the mouth is slightly open.