The ornamental design for a shoe, as shown and described.
FIG. 1 is a front perspective view of a shoe showing my new design;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a front view thereof; and,
FIG. 6 is a top view thereof.
The broken line showing of the sole, heel, heel cap, buckles, front cross-strap, portion of the front, portion of the upper, and buckle holes is for illustrative purposes only and forms no part of the claimed design.