-al a-a a-b aaa aab aad aal aas ab- aba abb abd abl abs ad- ada adb add adl ads al- ala alb ald all als as- asa asb asd asl ass baa bab bad bal bas bba bbb bbd bbl bbs bda bdb bdd bdl bds bla blb bld bll bls bsa bsb bsd bsl bss daa dab dad dal das dba dbb dbd dbl dbs dda ddb ddd ddl dds dl- dla dlb dld dll dls dsa dsb dsd dsl dss la- laa lab lad lal las lba lbb lbd lbl lbs lda ldb ldd ldl lds lla llb lld lll lls lsa lsb lsd lsl lss saa sab sad sal sas sba sbb sbd sbl sbs sda sdb sdd sdl sds sla slb sld sll sls ss- ssa ssb ssd ssl sss