The ornamental design for a shoe, as shown and described.
FIG. 1 is a side perspective view of a shoe showing my design;
FIG. 2 is a side view thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a front view thereof.
The even-length broken lines, which show the remainder of the article, are directed to environment, represent unclaimed subject matter, and form no part of the claimed design.