The ornamental design for a chest, as shown and described.
FIG. 1 is a front perspective view of a chest showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view, the opposite side being a mirror image thereof; and,
FIG. 4 is a top elevational view thereof.
The bottom and rear views of the design are not shown and are not part of the claimed design. The dashed lines represent environmental elements only and are not part of the claimed design.