Keyboard

FIG. 1 is a front perspective view of a keyboard according to our design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a front view thereof.

The dashed broken lines in the figures depict portions of the keyboard that form no part of the claimed design.

The dot dash broken lines in the figures define the bounds of the claimed design and form no part thereof.