The ornamental design for a scissors, as shown and described.
FIG. 1 is a perspective view showing the new design for a scissors;
FIG. 2 is a top view thereof, the bottom view being a mirror image thereof;
FIG. 3 is a left side view thereof, the right side view being a mirror image thereof;
FIG. 4 is a front view thereof; and,
FIG. 5 is a rear view thereof.
The broken lines in the drawings illustrate unclaimed portions of the scissors and form no part of the claimed design. In addition, the surface shading illustrated in the drawings is provided merely to highlight the contour of design; it is not intended to be illustrative of texture or gloss.