The ornamental design for shoes with a butterfly, as shown and described.
FIG. 1 is a perspective rear view of a right shoe showing my new design;
FIG. 2 is a perspective front view of the shoe shown in FIG. 1;
FIG. 3 is a front view of the shoe shown in FIG. 1;
FIG. 4 is a rear view of the shoe shown in FIG. 1;
FIG. 5 is a left side view of the shoe shown in FIG. 1; and,
FIG. 6 is a right side view of the shoe shown in FIG. 1.
All views of the left shoe have been omitted from the drawings as they are mirror images of those of the right shoe shown herein. The broken lines in the drawings form no part of the claimed design.