The ornamental design for a shoe, as shown and described.
FIG. 1 is a perspective view of a shoe showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a side elevational view thereof;
FIG. 4 is an opposite side elevational view thereof; and,
FIG. 5 is a top plan view thereof.
The broken line showing of portions of the shoe in the figures is included for the purpose of illustrating environmental structure and forms no part of the claimed design.