Confounding in a replicated $2^3$ design — reading the effect off the block layout

In a $2^3$ factorial design with three treatments A, B, C each at two levels, blocks of 4 plots are available. The design is replicated twice, with Replication 1 blocks $\{1,a,bc,abc\}$ / $\{b,c,ab,ac\}$ and Replication 2 blocks $\{1,b,ac,abc\}$ / $\{a,c,ab,bc\}$. Hence the two confounded treatment combinations in replication 1 and 2 respectively are: