If AAA is 2×32 \times 32×3 and BBB is 3×23 \times 23×2, which products are defined, and what are their dimensions?
Only ABABAB is defined; ABABAB is 2×22 \times 22×2.
Only BABABA is defined; BABABA is 3×33 \times 33×3.
Both ABABAB (2×22 \times 22×2) and BABABA (3×33 \times 33×3) are defined.
Neither ABABAB nor BABABA is defined.