What plant is this? (Grew out of wet paper in my sink)

Was sick for a couple of days and didn’t clean my kitchen sink. This had started growing there out of a wet piece of paper (it was only about 1-2 cm then). I took the piece of paper along with the plant and put it with dirt in a pot. Now it’s probably about 30 cm. Should also be noted that it’s standing up straight with the help of a plant stake.