FIG. 1 is a front perspective view of the ladder top showing my design. FIG. 2 is a top plan view thereof; FIG. 3 is a bottom view thereof; FIG. 4 is an end view; FIG. 5 is the opposite end view, which is identical the view in FIG. 4; FIG. 6 is a front view thereof; FIG. 7 is a back thereof; and, FIG. 8 is a perspective view thereof, showing attachment to a ladder in broken lines. The broken lines are presented for illustrative purposes only and form no part of the claimed design.