Suitcase

FIG. 1 is a front perspective view of a suitcase, showing our 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 a front perspective view shown in a state of use thereof; FIG. 10 is a rear perspective view shown in a state of use thereof; FIG. 11 is an enlarged detail view of area 11 in FIG. 1 thereof; FIG. 12 is an enlarged detail view of area 12 in FIG. 2 thereof; and, FIG. 13 is an enlarged detail view of area 13 in FIG. 6 . The broken lines in the drawings illustrate the portions of the suitcase, which form no part of the claimed design. The dash-dot-dash broken lines encircling the enlarged views are for annotative purposes only and form no part of the claim thereof.