The ornamental design for a board, as shown and described.
FIG. 1 is a front top right perspective view of a board, showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom pan view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a left side elevation view thereof; and,
FIG. 8 is a perspective detail view taken from FIG. 1 of the boundary between the coating and a non-coated portion of the board.
The broken lines in FIGS. 1 and 8 designating the enlarged reference views form no part of the claimed design. The remaining broken lines represent portions of the board that form no part of the claimed design.
The stippling in the figure drawings represents a contrast in appearance.