The ornamental design for a paperproduct, as shown and described.
The sole FIGURE is a top plan view of a paper product showing my new design. The design repeats uniformly throughout the length and width of a paper product, such as a paper towel or tissue. A specific length and width of the paper product forms no part of the claimed design. The broken lines in the drawing depict one repeat unit of the claimed design and forms no part of the claim. The surfaces or portions not shown in the drawing or described in the specification form no part of the claimed design.