Lock

FIG. 1 is a top right perspective view of a lock showing our new design; FIG. 2 is a bottom right perspective view thereof; FIG. 3 is a bottom left perspective view thereof; FIG. 4 is a front side view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a bottom view thereof; FIG. 7 is a top view thereof; FIG. 8 is a left side view thereof; and, FIG. 9 is a right side view thereof. The broken lines represent portions of the lock that form no part of the claim.