Pillow

FIG. 1 is a perspective view of my design for a pillow;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a bottom side view thereof;

FIG. 4 is a top side view thereof;

FIG. 5 is a left view thereof; and,

FIG. 6 is a right view thereof.

The broken lines present in the drawings are for the purpose of illustrating portions of the pillow which form no part of the claimed design. Additional broken lines represent environment and form no part of the claimed design.