-al a-a a-b aaa aab aad aak aal aas ab- aba abb abd abk abl abs ad- ada adb add adk adl ads aka akb akd akk akl aks al- ala alb ald alk all als as- asa asb asd ask asl ass baa bab bad bak bal bas bba bbb bbd bbk bbl bbs bda bdb bdd bdk bdl bds bka bkb bkk bkl bks bla blb bld blk bll bls bsa bsb bsd bsk bsl bss daa dab dad dak dal das dba dbb dbd dbk dbl dbs dda ddb ddd ddk ddl dds dka dkb dkk dkl dks dl- dla dlb dld dlk dll dls dsa dsb dsd dsk dsl dss ka- kaa kab kad kak kal kas kba kbb kbd kbk kbl kbs kda kdb kdk kdl kds kkb kkk kkl kks kl- kla klb kld kls ksa ksb ksd ksk ksl kss la- laa lab lad lak lal las lba lbb lbd lbk lbl lbs lda ldb ldd ldk ldl lds lka lkb lkl lks lla llb lld llk lll lls lsa lsb lsd lsk lsl lss saa sab sad sak sal sas sba sbb sbd sbk sbl sbs sda sdb sdd sdk sdl sds sk- ska skb skd skk skl sks sla slb sld slk sll sls ss- ssa ssb ssd ssk ssl sss