Pillowcase

FIG. 1 is a perspective view of a pillowcase. FIG. 2 is top view thereof. FIG. 3 is a left side elevation view thereof, the right side elevation view being a mirror image thereof. FIG. 4 is a bottom view thereof. FIG. 5 is a front view thereof. FIG. 6 is a rear view thereof. FIG. 7 is a perspective view of the pillowcase in use in conjunction with a pillow. FIG. 8 is a perspective view of the pillowcase in use in conjunction with a bed and a mattress; and, FIG. 9 is a perspective view of the pillowcase in use in conjunction with a mattress. The broken lines of the pillowcase that illustrate stitching form no part of the claimed design. The long-short broken lines define the bounds of the claimed design and form no part thereof. The broken lines in the figures showing parts that are included for the purpose of illustrated use and environment form no part of the claimed design.