FIG. 1 is a perspective view of a suitcase, showing my new design;
FIG. 2 is another perspective view
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 plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an enlarged view of portion of FIG. 1; and,
FIG. 10 is an enlarged view of portion of FIG. 1.
The broken lines shown in the drawings depict portions of the suitcase in which the design is embodied that form no part of the claimed design.