-vac aaaa aaab aaac aaal aaav aaba aabb aabc aabl aaca aacb aacc aacl aaco aacv aala aalc aall aalo aaoo aava abaa abab abac abal abb- abba abbb abbo abca abcb abcc abcl abla ablo ablv aboa abob abol aboo abov abva acaa acab acac acba acbl acca accc acco acla aclc acoa acol acvv alaa alac alal alao alb- alba albc albo alca alcc alco all- alla alll allo aloa aloc alol aloo alov alva alvo aoba aoca aola avab aval avao avcc avco avlb avva avvo baaa baal baba babb babo bac- baca bacc baco bala balc ball balo baol bava bbbb bblb bcaa bcbc bcca bccc bccl bcvo blaa blab blac blob bloc bloo boab boac boal boba bobb bobo boca boco bola boll bolo boob booc bool bova bovo c-bo caaa caab caac caal caba cabo cac- caca cacc caco cala calc call calo caol cava cavo cbac cbal cbbc cbca cbcc cbcl cblb cblc cbol cbva cbvb ccaa ccab ccac ccba ccbc ccca cccb cccc cccl cccv ccla cclc cclv ccob ccoc ccvo clab clav clob cloo coal coba cobb cobo coca coco col- cola colb coll colo coob cool cova covo cvac cvca cvcc laaa laac laal laba labo laca lacc lacl laco lala lall lalo lava lavc lavo lbcc lcac lcbc lcca lccc llao llcc lllc llll lloa lloc lloo lo-v loac lob- loba lobb lobo loca locc loco lola loll lolo loob looc lool lovo lvcc lvov oall obal obba obbo obla obol ocab ocac ocal ocbc occa occc oclc olac olav olba olbo olca olcc olla ollo olov ooaa ooba oola oolo oooo oval ovo- ovol ovoo vaal vaca vaco vala vall valo vava vbcc vcal vlab vlba vlcc vloc voca vola volc voll volo vooc vool vvob vvvv