-ana aaaa aaab aaac aaal aaan aaba aabb aabc aabl aaca aacb aacc aacl aacn aala aalc aall aana aang abaa abab abac abag abal aban abb- abba abbb abca abcb abcc abcl abcn abgl abla acaa acab acac acag acan acba acbl acca accc acga acla aclc agac agag agal agan agba agca agcc agga agla aglc agna alaa alac alag alal alan alb- alba albc alca alcc alg- alga all- alla alll alln alna ana- anaa anab anac anag anal anan anba anbb anbl anca ancc ang- anga angl anla anlc anln anna annb baaa baal baan baba babb bac- baca bacc bacn baga bagg bagn bala balc ball bana banc bang bann bbbb bbga bblb bbng bcaa bcbc bcbg bcca bccc bccl bgan bgca blaa blab blac blag blan caaa caab caac caal caan caba cabg cac- caca cacc caga cagg cagn cala calc call cana canc cang cann cbac cbal cbbc cbca cbcc cbcl cbcn cbga cbgb cblb cblc cbln cbna ccaa ccab ccac ccag ccba ccbc ccbn ccca cccb cccc cccl ccga ccgc ccla cclc cclg ccna ccnb ccnc cgac cgal cgcc cgcg clab clag clan cnaa cnac cnag cnbc cnbl cnna gaal gaba gabb gabl gaga gagg gala gall gana ganc gang gann gbag gban gc-c gcaa gcal gcbc gccc gclc gcna ggcl gggg glaa glab glan glbc glcc gnaa gnac gnal gncc gngc laaa laac laag laal laan laba laca lacc lacl lag- laga lagg lala lall lan- lana lanc lang lann lbcc lcac lcbc lcca lccc lgca llan llcc llgc lllc llll naaa naab naac naag naal naan naba nabc nabl naca nacc nacl naga nagc nagl nala nalc nall nan- nana nanb nang nann nbaa nbbc nbca nbcc ncaa ncac ncba ncbc ncca nccc nccn ncga nclc ncln ncna ncnc ngab ngac ngan nlab nlcc nlgn nngn nnnn