-al a-a a-b a-i aaa aab aai aal aas aax ab- aba abb abi abl abs abx ai- aia aib aii ail ais aix al- ala alb ali all als alx as- asa asb asi asl ass asx ax- axa axi axl axs axx baa bab bai bal bas bax bba bbb bbi bbl bbs bbx bi- bia bib bii bil bis bix bla blb bli bll bls blx bsa bsb bsi bsl bss bsx bxb bxi bxl bxx ia- iaa iab iai ial ias iba ibb ibi ibl ibs ibx iia iib iii iil iis iix il- ila ilb ili ill ils ilx is- isa isb isi isl iss ixi ixl la- laa lab lai lal las lax lba lbb lbi lbl lbs lbx lia lib lii lil lis lix lla llb lli lll lls lsa lsb lsi lsl lss lxi lxx saa sab sai sal sas sax sba sbb sbi sbl sbs sbx sia sib sii sil sis six sla slb sli sll sls slx ss- ssa ssb ssi ssl sss ssx sxi sxl sxs xaa xal xas xbl xbx xia xii xis xix xla xlb xli xls xsa xsb xsi xsl xss xxi xxl xxx