I claim the ornamental design for a bench, as shown and described.
FIG. 1 is an upper perspective view of a bench showing my new design;
FIG. 2 is a lower perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left-side view thereof;
FIG. 6 is a right-side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines in the figures are for the purpose of illustrating portions of the bench, which form no part of the claimed design. The shade lines represent surface shading and not surface ornamentation, color, or material type.