The ornamental design for a shirt, as shown and described.
FIG. 1 is a front left perspective view of a shirt showing our new design in a relaxed state;
FIG. 2 is a front right perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a front left perspective view of the shirt showing our new design in an extended state;
FIG. 9 is a front right perspective view thereof;
FIG. 10 is a front view thereof;
FIG. 11 is a rear view thereof;
FIG. 12 is a left side view thereof;
FIG. 13 is a right side view thereof; and,
FIG. 14 is a bottom view thereof.
The appearance of the shirt transitions between its relaxed state shown in FIGS. 1-7 and the extended position shown in FIGS. 8-14.
The dashed-dot line immediately adjacent to the shaded area represents unclaimed boundaries of the design. The other dashed-dot lines showing the remainder of the shirt are for environmental purposes only and form no part of the claimed design. The contrast in shading represents a contrast in appearance only and does not represent any particular color, material, texture or finish.