The ornamental design for a shoe, as shown and described.
FIG. 1 is a side view of a shoe showing my design;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a top view thereof; and,
FIG. 4 is a front view thereof.
The four unshaded regions within the shaded area that are demarcated by broken lines form no part of the claimed design. The even length broken lines showing a shoe are directed to environment and form no part of the claimed design.