Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to make a pvc pet bed [title] Get your pvc pieces all together. [step] You can use a smaller size (3/4 inch is used here), but it won't be as strong. [title] Start assembling them.

Ending1: [step] Be sure that the feet are headed in the same direction and the shape is as squared as you can get it. It is very easy to get turned around. Ending2: [step] Attach a rubber band to the bottom outside plastic stem. Attach thin cardboard to the inner plastic stem. Ending3: [step] Put the pvc pieces into the tray with the holes covered. Make sure the top of the pvc pieces is flat and even. Ending4: [step] Make sure you don't cover the pvc. Apply an extra layer using a clean cloth.

Answer format: ending1/ending2/ending3/ending4