Sock

FIG. 1 is a front perspective view of a sock;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof, with the left side elevation view being a mirror image thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown in the drawing depict environment only and form no part of the claimed design.