The ornamental design for a can, as shown and described.
1, 3, 5, 7, and 9 Cans
1.1 : Front
1.2 : Right
1.3 : Top
1.4 : Bottom
1.6 : Perspective
3.1 : Front
3.2 : Right
3.3 : Top
3.4 : Bottom
3.6 : Perspective
5.1 : Front
5.2 : Right
5.3 : Top
5.4 : Bottom
5.6 : Perspective
7.1 : Front
7.2 : Right
7.3 : Top
7.4 : Bottom
7.6 : Perspective
9.1 : Front
9.2 : Right
9.3 : Top
9.4 : Bottom
9.6 : Perspective
Designs 1, 3, 5, 7 and 9 back views are omitted since they are the same as the front views; left views are omitted since they are the same as the right views; all of the shades expressed on the entire surface are for specifying the shape of the three-dimensional surfaces; one-dotted chain lines show boundaries between the claimed parts and the other parts; reproductions 1.5, 3.5, 5.5, 7.5, 9.5 and each reproduction is an end view sectioned horizontally at the bottom line of any rows that is provided with patterns of isosceles triangles which are arranged in staggered way.