You'll find they're organized in groups of twos and threes. That is, two black keys with one white key in between them, then, going right, two adjacent white keys, then three black keys with one white key between each one and the next, then again, two adjacent white keys, and the pattern repeats again. The five keys must be ordered as two keys group then three keys group, not the other way around.
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One-sentence summary -- Look at the black colored keys of the keyboard. Find the group of five black keys right in the middle of the keyboard (or at least, the group that is almost in the middle for smaller keyboards). Find the group of two black keys in the group you located in the previous step. Middle-C will be the white key immediately below (to the left of) the first black key of the two keys you found in the previous step.

Q: A sewing machine that is specifically designed for leather will work the best, but you can try using a heavy duty sewing machine as well. Do not use a standard sewing machine; it is not strong enough. You may be able to find these sewing machines in stores that specialize in leather working tools or sewing machines. You may also be able to find them online. Fit an 18-gauge needle into your sewing machine. Change the stitch length to the widest that you can find, or something around 1⁄8 inch (0.32 cm) wide. Thread your sewing machine with 100% nylon or polyester upholstery thread.  Do not use cotton thread, as the tannin in the leather will degrade it over time. For best results, use a sharp leather needle. Shake the can for a few seconds, then hold it 4 to 6 inches (10 to 15 cm) away from the back of the patch. Apply a light, even misting of spray adhesive. Do not use too much, however; you need just enough to keep the patch in place as you sew it.  If you can't get any spray adhesive, you can try using rubber cement or a glue stick. Do not use sewing pins, as they will leave behind permanent holes in the leather. Check the label on the can to see whether or not you need to wait for the glue to get tacky first. Decide where you want the patch to go, then place it onto the leather. Gently press down on the patch until it feels secure. If you need to, use the seams on your leather vest as a reference point. Sew as close as possible to the embroidered border on your patch. Go slowly around curves. When you hit an angle or a corner, push the needle down, lift the foot, and rotate the vest. Push the foot back down before you resume sewing. If your vest is lined, make sure that you smooth the lining out first. When you are back to where you started sewing, continue sewing for another 1 to 1 1⁄2 inches (2.5 to 3.8 cm). This will create a 1 to 1 1⁄2 in (2.5 to 3.8 cm) long overlap at the start and end of your sewing and prevent unraveling. It also saves you from the task of backstitching, which will only create more work for you. Lift the needle out of the vest, if needed, and pull the foot up. Slide the vest out from under the foot and cut the thread as close as possible to the lining and the patch.
A: Get a sewing machine that's capable of sewing through leather. Set up your machine with an 18-gauge needle and a wide stitch. Spray the back of your patch with spray adhesive. Place the patch on the vest where you want it to go. Sew the patch onto the leather vest, starting at 1 of the corners. Overlap your first and last stitches by 1 to 1 1⁄2 inches (2.5 to 3.8 cm). Pull the vest out of the sewing machine and cut the thread.

Article: Making your own pea protein powder is easy, but you will need to gather some things before you get started. To make your own pea protein powder, you will need:  Two cups of dried yellow peas Plenty of water for soaking Paper towels A large glass bowl to soak the peas A large baking sheet A high-powered blender or food processor A large mason jar with a lid Put the yellow peas into a colander and rinse them under running water. Make sure that you sort through the peas as you rinse them to weed out any rocks or clumps of dirt. This is common with dried peas, beans, and lentils. Place the dried yellow peas into a large glass bowl and cover them with water. Make sure that the water covers all of the peas and that there is a few inches of water above the peas as well. The peas will expand as they soak. Cover the bowl with some plastic wrap and allow the peas to soak overnight.  Soak the peas for at least eight hours. After eight hours, drain the peas by pouring them into the colander. Then, rinse the peas one more time under running water. Line the glass bowl with a wet paper towel and then pour the peas over the paper towel. Next, lay another wet paper towel over the peas and then cover the bowl with some plastic wrap. Leave the peas in the bowl for 24 to 48 hours, or until they start to sprout. Keep the bowl at room temperature by setting it on a counter. Preheat your oven for 115°F (46°C). Next, remove the plastic wrap and paper towels from the peas and spread the sprouted peas out on a baking sheet.  Leave the peas in the oven for about 12 hours. Remove the peas from the oven after 12 hours. To see if the peas are dry, bite into one. It should be crunchy. Once the peas are dry, you can pour them into the blender or food processor. Place the lid on the blender or food processor and blend the peas at a high speed until they reach a powder-like consistency.  If you want to customize your pea protein powder, then you can add other ingredients to it. If you just want a basic protein powder, then you can transfer the protein powder to a large mason jar and place a lid on it.
Question: What is a summary of what this article is about?
Gather your ingredients and materials. Rinse the dried yellow peas. Soak the yellow peas overnight. Sprout the peas. Dry the peas in the oven. Blend the dried peas.