-al a-a a-b a-i aaa aab aai aal aas ab- aba abb abi abl abs ai- aia aib aii ail ais al- ala alb ali all als as- asa asb asi asl ass baa bab bai bal bas bba bbb bbi bbl bbs bi- bia bib bii bil bis bla blb bli bll bls bsa bsb bsi bsl bss ia- iaa iab iai ial ias iba ibb ibi ibl ibs iia iib iii iil iis il- ila ilb ili ill ils is- isa isb isi isl iss la- laa lab lai lal las lba lbb lbi lbl lbs lia lib lii lil lis lla llb lli lll lls lsa lsb lsi lsl lss saa sab sai sal sas sba sbb sbi sbl sbs sia sib sii sil sis sla slb sli sll sls ss- ssa ssb ssi ssl sss