The ornamental design for a can, as shown and described.
1. Can
1.1 : Front
1.2 : Top
1.3 : Bottom
1.4 : Perspective (front, top, left)
The shadings in the reproductions represent contours only and do not illustrate an ornamentation or decoration on the surface of the product; the front view, back view, left side view and right side view are identical.
The broken lines in the drawings depict portions of the can that form no part of the claimed design.