ZZLL
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The Zbigniew Zborowski Last Layer is the subset of ZBLL in which two opposite LL edges are correctly permuted. It is used to solve the last layer in the ZZ-b variant of the ZZ Method. Compared with ZBLL's 494 cases, ZZLL has only 169 distinct cases which can be completed with a minimum of 80 algorithms assuming mirrors and inverses are used. ZZLL also serves as a useful transition between COLL/EPLL and full ZBLL.