The ornamental design for a shirt, as shown and described.
FIG. 1 is a rear perspective view of a shirt showing the new design in a first in-use non-illuminated state;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is a second side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a rear perspective view of the shirt of FIG. 1-7 showing the new design in a second in-use illuminated state;
FIG. 9 is a front perspective view thereof;
FIG. 10 is a rear view thereof;
FIG. 11 is a side view thereof;
FIG. 12 is a second side view thereof;
FIG. 13 is a top view thereof;
FIG. 14 is a bottom view thereof; and,
FIG. 15 is the rear view of FIG. 10 showing the new design in the second illuminated state with radiating lines to show the illumination thereof.
The grayscale shading in FIGS. 8-14 depict an illuminated state of the rectangular element. The broken lines immediately adjacent to the shaded area define the bounds of the claimed design and form no part thereof.