-al a-a a-b a-t aaa aab aak aal aas aat ab- aba abb abk abl abs abt aka akb akk akl aks al- ala alb alk all als alt as- asa asb ask asl ass ast at- ata atb atl ats att baa bab bak bal bas bat bba bbb bbk bbl bbs bbt bka bkb bkk bkl bks bkt bla blb blk bll bls blt bsa bsb bsk bsl bss bst bta btb btk btl bts btt k-t ka- kaa kab kak kal kas kat kba kbb kbk kbl kbs kkb kkk kkl kks kkt kl- kla klb kls klt ksa ksb ksk ksl kss kst kta ktb ktk ktl kts ktt la- laa lab lak lal las lat lba lbb lbk lbl lbs lbt lka lkb lkl lks lkt lla llb llk lll lls llt lsa lsb lsk lsl lss lst lta ltb ltk ltl lts ltt saa sab sak sal sas sat sba sbb sbk sbl sbs sbt sk- ska skb skk skl sks skt sla slb slk sll sls slt ss- ssa ssb ssk ssl sss sst sta stb stk stl sts stt taa tab tak tal tas tat tba tbb tbk tbl tbs tbt tka tkb tkk tkl tks tkt tla tlk tll tls tlt tsa tsb tsk tsl tss tst tta ttb ttk ttl tts ttt