The ornamental design for a boot, as shown and described.
FIG. 1 is a perspective view of a left boot, showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The broken lines with equal size single dashes are shown for the purpose of illustrating environmental subject matter which forms no part of the claimed design.
The broken lines with a single long dash and two short intermediate dashes illustrate stitching and are part of the claimed design.
The surface shading and contour lines shown in the drawings represent the three-dimensional character and contour of the article, and are not intended to illustrate material, surface ornamentation or surface decoration.