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a4, b4, ia4, ib4: Int[4];
a16, b16, ia16, ib16: Int[16];
sa4, sb4, sa16, sb16: Int[4] ←v "7";
Equivalence a4 cat a16, b16 cat b4;
da4: Driver4[ia4, a4, sa4];
db4: Driver4[ib4, b4, sb4];
da16: Driver16[ia16, a16, sa16];
db16: Driver16[ib16, b16, sb16]