国家重点实验室 Size 4 and 8 constructions U X1 W U2 X2 W U X3 W U ⊕ Ya X5 Y X6 1000 Yo 1100 Y7 G4= W 1 0 1 0 1111 X=UG 16Size 4 and 8 constructions 16 4 1000 1100 1010 1111 G     =         4 4 X1 14 =U G