FIG. 1 is a front perspective view of a suitcase, showing my new design;
FIG. 2 is a rear perspective view thereof;
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 view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is front perspective view of the suitcase, shown in an open configuration; and,
FIG. 10 is a partial enlargement of FIG. 5.
The broken lines in the drawings illustrate portion of the suitcase, which form no part of the claimed design. The dash-dot broken lines illustrate the bounds of the enlarged view only and form no part of the claimed design.