The ornamental design for a bed, as shown and described.
FIG. 1 is a perspective view of a bed according to the invention;
FIG. 2 is a front view of a bed showing my new design;
FIG. 3 is a rear view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is side opposite that shown in FIG. 4;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions of the figures illustrated in broken lines are provided for illustrative purposes only and form no part of the claimed design. Portions of the frieze forming part of the claimed design may include elements of one or more current or prior trademarks of New York Yankees Partnership, Executive Offices, Yankee Stadium, One East 161st Street, Bronx, N.Y. 10451.