Please choose the correct ending to complete the given sentence: Health: [header] How to sleep without using a bed [title] Find a place to lie down or sit in a relaxed posture. [step] It can be hard to get comfortable to sleep when you don't have a bed to lie down in (at the airport, for instance). Sometimes there is simply no feasible place to lie down, so you may have to opt for a chair or sitting against a wall.

Ending1: This method will work for both types of people. [substeps] You can also try unsupported wall-sits if you're under complicated circumstances such as theft or hoarding. Ending2: If you need a few places to relax, look for the following : [substeps] A desk, book, or other place to sit. A table with either a comfortable seat or a chair that can act as a footrest. Ending3: Either way, you want to pull your knees up towards your chest. [substeps] To avoid twisting or chafing your sensitive skin, make sure to go wherever you feel you would be most comfortable. Ending4: If possible recline at a 135-degree angle for the most comfort. Avoid sleeping sitting straight up or leaning forward because this may cause undue pressure on your back and neck and it may also contribute to pain in those areas.

Answer format: ending1/ending2/ending3/ending4