-al a-a a-b a-i aaa aab aai aak aal aas ab- aba abb abi abk abl abs ai- aia aib aii aik ail ais aka akb aki akk akl aks al- ala alb ali alk all als as- asa asb asi ask asl ass baa bab bai bak bal bas bba bbb bbi bbk bbl bbs bi- bia bib bii bik bil bis bka bkb bkk bkl bks bla blb bli blk bll bls bsa bsb bsi bsk bsl bss ia- iaa iab iai ial ias iba ibb ibi ibk ibl ibs iia iib iii iil iis ika ikb iki ikk ikl iks il- ila ilb ili ilk ill ils is- isa isb isi isk isl iss ka- kaa kab kai kak kal kas kba kbb kbi kbk kbl kbs kia kib kii kik kil kis kkb kki kkk kkl kks kl- kla klb kli kls ksa ksb ksi ksk ksl kss la- laa lab lai lak lal las lba lbb lbi lbk lbl lbs lia lib lii lik lil lis lka lkb lkl lks lla llb lli llk lll lls lsa lsb lsi lsk lsl lss saa sab sai sak sal sas sba sbb sbi sbk sbl sbs sia sib sii sik sil sis sk- ska skb ski skk skl sks sla slb sli slk sll sls ss- ssa ssb ssi ssk ssl sss