The ornamental design for a cerealfoodpiece, as shown and described.
FIG. 1 is a front, right side perspective view of a cereal food piece according to our design shown in an environment of use;
FIG. 2 is a front, left side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in FIG. 1 illustrate the environment of the claimed design and form no part thereof. The less concentrated stippled shading and more concentrated stippled shading areas shown in FIGS. 1-8 represent contrasting appearances.