Please choose the correct ending to complete the given sentence: Health: [header] How to tell if you have mouth cancer [title] Look for ulcers and sores on your lips, tongue, cheeks and the floor of your mouth. [step] Mouth ulcers are very common and are not a surefire sign of mouth cancer in and of themselves. However, when mouth ulcers are combined with other symptoms and their development follows a certain pattern, they may indicate cancer.

Ending1: [substeps] Mouth ulcers are usually red, itchy, bloody or tender. Redness should never be a sign of mouth cancer. Ending2: [substeps] Also examine your hands to see if you have ulcers. Tongue ulcers usually occur due to blood clots entering your mouth. Ending3: [substeps] Look for mouth ulcers which have not healed in over two or three weeks. Look for mouth ulcers that recur in the same areas of the mouth over and over again. Ending4: [substeps] Sores may start on a velvety surface and darken up. Sores may appear scaly with raised red edges, but these sores do not look like ulcers as they do not indicate mouth cancer.

Answer format: ending1/ending2/ending3/ending4