The ornamental design for a papersheet, as shown and described.
FIG. 1 is a perspective view of a paper sheet according to our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear plan view thereof;
FIG. 4 is a side elevation view thereof;
FIG. 5 is the other side elevation view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dash-dot-dot-dash broken lines within FIGS. 1 and 2 denote the boundaries of the claim and form no part thereof. The areas and broken lines outside of the boundary depict portions of the paper sheet that forms no part of the claimed design.