The ornamental design for a chair, substantially as shown.
FIG. 1 is a front perspective view of one embodiment of the design with a
back and one side of equal height.
FIG. 2 is a rear perspective view of the embodiment shown in FIG. 1.
FIG. 3 is a front perspective view of a second embodiment of the design
with a back and side of equal height but higher than the back and side of
the embodiment of FIGS. 1 and 2.
FIG. 4 is a rear perspective view of the embodiment of FIG. 3.