The ornamental design for a block, as shown and described.
Description:
FIG. 1 is a front view of a block showing my new design; the rear view is the same as the front view;
FIG. 2 is a left side view thereof; the right side view is the same as the left side view;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof; and,
FIG. 5 is an enlarged perspective view thereof.
The line pattern shown on the front and rear surfaces of the block shown in FIGS. 1 and 5 of the drawing views is understood to represent surface shading indicating a solid surface.
