In one sentence, describe what the following article is about: Water-tight is airtight, and you need to prevent air from escaping your hands to make them whistle. You lips will be puckered out, but somewhat close together. Imagine you are "booing” someone on stage.
Summary: Cup your left hand like you are about to drink water from it. Purse your lips as if you were making an “ooo” sound.

Each post should be 3 feet (0.91 m) away from each other—start by marking the first post location with chalk at one end of the wall. Now, move in 3 foot (0.91 m) increments along the line until you reach the end.  Use a taut string and stakes or a snapped chalk line to help you create a straight line. If you need to extend your wall with another post to create the final 3 feet (0.91 m) then do so. Space your posts 16 to 18 inches (41 to 46 cm) apart for load-bearing walls, which are walls that support something aside from their own weight such as a roof. Start by using a D-handle shovel to loosen the dirt along each side of the trench. Once it's loose enough, dig out the middle with a trench shovel. Continue loosening and digging into the soil with each of your shovels.  Call your local utility services number at least 3 to 4 days before digging to ensure it's legal and won't damage underground structures, such as power, sewer, water, or gas lines. Consider renting heavy equipment to dig your trench. Saw through large roots with a reciprocating saw or using the tip of your trench shovel. Use a steel bar to loosen rocks. for your posts. Thrust your shovel into the soil and jiggle it forward and backward and side to side. Once the soil is loosened, start digging down into the ground. Grip the middle of the shovel's handle with your non-dominant hand and the top of the handle with your dominant hand.  Use a steel bar to knock rocks loose. Remove large sections of loose soil with a clamshell digger. Saw through large roots by thrusting your shovel down into them or using a reciprocating saw.
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One-sentence summary -- Mark your post hole locations on the ground with chalk. Dig a 12 inch (30 cm) deep trench between your post locations. Dig 18 inch (46 cm) deep holes

Q: You will want to make sure you have what you need for the night and morning close at hand.  Gather your clothes and toiletries for the next day and place them on a shelf or somewhere where they will stay dry. Find an outlet for your phone.  Make sure you will be able to reach your phone from the tub so you can see what time it is and use it as an alarm in the morning. Bring in anything you will use to entertain yourself, like a tablet, laptop, or a book to read. If there is only one bathroom available, it’s best to be on the same page so everyone can agree on how to deal with the situation. You don’t want someone turning on the shower on you in the morning!  Decide what you will do if someone else needs to use the bathroom during the night. Agree on what time will be reasonable for you to wake up and get out of the bathtub so others can use it for showers in the morning. It’s time to get in the tub and start snoozing, so get comfy.  Position yourself with your head on the opposite side of the tub from the tap. That way if you forget where you are and sit up you won’t bump your head or face on the faucet. Use the fan for white noise if you need to block out background noise to sleep better.  Turn out the lights.  If you think you might wake up and be disoriented, use a nightlight. That will also help your roommates in case they forget you’re in there and you startle them.
A: Bring your personal items into the bathroom. Touch base with your guests or roommates. Go to sleep!

Article: You will need to be able to stack these stones so that they will provide a sturdy base for your bath. Look for stones that are large and relatively flat. Take the stones you have found and stack them, one on top of the other. Try to arrange them so that they are level. It will be a bit like a puzzle, as you try to match the jutting edges in some rocks with the gaps in others. Birds sometimes use bowls lying directly on the ground as birdbaths. They prefer, however, for their birdbaths to be at least a few inches off the ground, but it is not absolutely necessary that they be very high up. Once the stones are relatively level, place a trashcan lid on top of them. You do need to pile the stones very high. Your priority should be creating a level surface for the lid.  The lid should be deep enough for you to fill it with 1-2 inches (2-5 cm) of water and wide enough that there is enough room for you to put a large stone in the center and still have space for birds to get inside. It is counterproductive to have more than 2 inches of water in a birdbath. Place a heavy stone in the center of the trashcan lid to hold it in place on top of the other stones. Be sure the stone is centered or it will throw the lid off balance. Once the lid is secure, fill it with water. The birds should show up in no time!
Question: What is a summary of what this article is about?
Find large level stones. Stack stones. Build the stone pillar at least a few inches off the ground. Place a trashcan lid on top. Secure the lid with a large stone. Fill the lid with water.

Problem: Article: Your hermit crab will need lots of places to hide. One of these hiding spots could be a broken ceramic pot, which you could pick up from a garden center or a pet store.  You should disinfect it first with a mixture of two parts dechlorinated water and one part hydrogen peroxide.  Since hermit crabs are scavengers, they may hide food between little cracks in your decorations. Be aware that this can cause mold. Sweep through the substrate every few days to check for buried food. To allow your hermit crab to move to a new shell, you should add three large shells. Hermit crabs love housing options. Each shell should be a bit larger than the crab’s current shell. Start by opening up a coconut. Put a screwdriver on the indentation of the coconut. Using a hammer, bang the screwdriver into the coconut and pry it open so that you have two halves. Use a spoon to take out the meat, which you can feed to your crabs. Leave it in dechlorinated saltwater for twenty-four hours, and then dry it out in the oven. Place the two halves of the coconut in your tank. For dehydration, you can bake it at 200 Fahrenheit (93 Celsius) for 30 minutes. Pick up some moss from the pet store. Sprinkle it across the substrate. Put a bunch into a plastic shower container to create a little moss pit.  If you prefer, you could also add a little bit of substrate to the bottom of the container. Then, fill it up with some moss for a little play area. Don’t use craft moss or any dyed mosses. You can get some shower containers, such as the kind used to store soap in a shower. If the container doesn’t come with suction cups, you can pick some up from the dollar store. Install the shower container on the side of the tank for a higher hiding place.
Summary:
Add a broken ceramic pot. Place some sanitized shells on the substrate. Make coconut caves. Lay down a moss pit. Install a shower container with suction cups.