Key

FIG. 1 is a front perspective view of a key showing the design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a top view thereof; FIG. 5 is a bottom view thereof; FIG. 6 is a left side view thereof; and, FIG. 7 is a right side view thereof. The dashed lines shown are included for the purpose of illustrating portions of the key, and the dashed-dot lines depict boundary of the claimed design. The broken lines form no part of the claimed design.