Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to roll sushi [title] Place a sheet of nori on your sushi mat. [step] Sheets of nori have a rough side and a smooth side. Place the nori so that the rough side is facing up.

Ending1: [substeps] You can find sushi mats and packages of nori at most asian food markets. You can order both of them online as well (nori is dried and is easily shipped). Ending2: Use the bottom of the sheet as your ruler to determine how wide and tall to roll your nori if you'd like. For a medium height nori, you'll need to roll your nori at least 1.5 inches (3.81 cm) wide and 6 inches (15 cm) tall. Ending3: Use the nori's momentum to roll the nori across the sheet. [substeps] You can use the nori on your sushi mat as well, using it as a bed, for instance. Ending4: Secure the nori to the sheet with a secure hold. The nori side should not interfere with or distract the sushi mat from your sushi roll.

Answer format: ending1/ending2/ending3/ending4