-vac aaaa aaab aaac aaal aaav aaba aabb aabc aabl aaca aacb aacc aacl aacv aala aalc aall aava abaa abab abac abal abb- abba abbb abca abcb abcc abcl abla ablv abva acaa acab acac acba acbl acca accc acla aclc acvv alaa alac alal alb- alba albc alca alcc all- alla alll alva avab aval avcc avlb avva baaa baal baba babb bac- baca bacc bala balc ball bava bbbb bblb bcaa bcbc bcca bccc bccl blaa blab blac caaa caab caac caal caba cac- caca cacc cala calc call cava cbac cbal cbbc cbca cbcc cbcl cblb cblc cbva cbvb ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccv ccla cclc cclv clab clav cvac cvca cvcc laaa laac laal laba laca lacc lacl lala lall lava lavc lbcc lcac lcbc lcca lccc llcc lllc llll lvcc vaal vaca vala vall vava vbcc vcal vlab vlba vlcc vvvv