Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to build bunk bed stairs [title] Use 2 x 4 dimensional lumber for the side rails. [step] A pair of 8 feet (2.4 m) long pieces of good-quality 2 x 4 dimensional lumber will work well for this job. Pick through the pile at the lumber yard to avoid pieces that are warped, bowed, or cracked.

Ending1: [substeps] Check that lumber is straight and " true " by holding one end up to your eyes and looking down the length of the wood. [title] Grab 1 x 3 dimensional lumber for the stair treads (ladder rungs). Ending2: Make sure the wooden slats are 16 feet (4.6 m) apart. This will help you to build your risers, and give you a more secure footing. Ending3: [substeps] A 2 x 4 full sheet of corrugated metal will be needed to support the bed, leaving you room for bed posts and sheets. [title] Buy planks and planks for the walls. Ending4: Wood comes from sites such as quarries, barn and perhaps a factory. These boards will help stabilize the wood without warping it too much.

Answer format: ending1/ending2/ending3/ending4