Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to use a knife sharpener [title] Examine the knife sharpener. [step] There are multiple types of manual knife sharpeners. Some only have one slot, while others may have two or three.

Ending1: [substeps] Each slot should have two steel, ceramic, or diamond-coated disks on either side, and these disks are what sharpen the blade of the knife. Simple knife sharpeners only have on sharpening slot, but others have two or three. Ending2: These kits generally include solid blocks, hand saws, or machine siders. In order to use these kit effectively, it's important that you obtain one such as a saw-or a socket to cut the better bars with an electric knife. Ending3: [substeps] Hold the sharpener firmly in place with your thumb and pointer finger. Run your thumb and middle finger along the outside edge of the knife using downward motion at a time, going up and down in a circular motion. Ending4: Determine which type of knife sharpener you want. The exact orientation of the knife's slot determines which tool you will need the sharpener for.

Answer format: ending1/ending2/ending3/ending4