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The ornamental design for a z-shaped building block, as shown and described. |
FIG. 1 is a top right side perspective view of a z-shaped building block showing my new design;
FIG. 2 is a bottom right side perspective view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a top right side perspective view of a second embodiment of a z-shaped building block showing my new design;
FIG. 5 is a bottom right side perspective view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a top right side perspective view of a third embodiment of a z-shaped building block showing my new design;
FIG. 8 is a bottom right side perspective view thereof;
FIG. 9 is a left side elevational view thereof;
FIG. 10 is a top right side perspective view of a fourth embodiment of a z-shaped building block showing my new design;
FIG. 11 is a bottom right side perspective view thereof;
FIG. 12 is a left side elevational view thereof;
FIG. 13 is a top right side perspective view of a fifth embodiment of a z-shaped building block showing my new design;
FIG. 14 is a bottom right side perspective view thereof; and,
FIG. 15 is a left side elevational view thereof.
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