We claim the ornamental design for a bench, as shown and described.
FIG. 1 is front view of a bench;
FIG. 2 is rear view of the bench;
FIG. 3 is a side view of the bench;
FIG. 4 is a top view of the bench;
FIG. 5 is a bottom view of the bench; and,
FIG. 6 is a perspective view of the bench.
Applicant notes that the side view of the bench, as shown in FIG. 3 is representative of both a right side view and left side view of the bench. Any subject matter shown in dashed lines, and any surfaces of the design not shown, including interior surfaces, form no part of the claimed invention.