Please choose the correct ending to complete the given sentence: Health: [header] How to get to sleep [title] Make the room as dark as possible. [step] Pick a good sleeping position. Light suppresses the production of melatonin, a hormone your brain secretes to make you sleepy.

Ending1: Eliminating as much light as possible can boost melatonin production and help you get to sleep. [substeps] Draw your blinds or curtains to block out any street lights. Ending2: Staying asleep, more melatonin is released in the body. [substeps] If you have a little light in your room, try having a lamp at your bedside to remind you to stay in bed. Ending3: However, try to reduce the amount of light that is emitted in the room that you sleep in to make up for this. Stay away from air vents and other distraction devices that can regulate melatonin production. Ending4: [substeps] The earlier you get comfortable in your dark environment, the better. Try to sleep in patterns that calm you.

Answer format: ending1/ending2/ending3/ending4