Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to make a nerf grenade [title] Buy a fold-up frisbee. [title] Buy a rubber band. [title] Make sure you have some 1 inch (2.5 cm)-1 and a half inch stefans.

Ending1: [title] Punch an l shape on a piece of paper so the flame that comes out would be on the paper. [title] Screw one end of the antenna/tube with the valve/tube on it inside. Ending2: [title] Tie along the front and back of each single stefan. [title] Set up the machine by using three rolls of toilet paper and a fabric band, and making fists which roll. Ending3: [title] Put some paper bands on the disks in back of the frisbee. [title] Turn on the projector and put on a tv show that you want to see. Ending4: [title] Fold the frisbee in half. [title] Fold one of the sides over the other.

Answer format: ending1/ending2/ending3/ending4