The ornamental design for shorts, as shown and described.
FIG. 1 is a front view of shorts according to the design;
FIG. 2 is a rear view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof; and,
FIG. 5 is a rear view thereof shown in an environment of use.
The portions of the shorts shown in broken lines in FIGS. 1-5 do not form part of the claimed design. The broken line showing of the items in the pockets of the waistband of the shorts in FIG. 5 is for the purpose of illustrating portions of the environmental structure and forms no part of the claimed design.