I claim the ornamental design for a bench, substantially as shown and described.
FIG. 1 is a perspective view of the front of the bench;
FIG. 2 is a perspective view of the front of the bench;
FIG. 3 is a perspective view of the front of the bench;
FIG. 4 is an elevation view of the front side of the bench;
FIG. 5 is an elevation view of the back side of the bench;
FIG. 6 is an elevation view of the left side of the bench;
FIG. 7 is an elevation view of the right side of the bench
FIG. 8 is an elevation view of the top of the bench; and,
FIG. 9 is an elevation view of the bottom of the bench.
The broken lines showing portions of the design in all figures is included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design.