-al a-a a-b a-t aaa aab aal aan aas aat ab- aba abb abl abn abs abt al- ala alb all aln als alt an- ana anb anl ann ans ant as- asa asb asl asn ass ast at- ata atb atl atn ats att baa bab bal ban bas bat bba bbb bbl bbn bbs bbt bla blb bll bln bls blt bna bnb bnl bnn bns bnt bsa bsb bsl bsn bss bst bta btb btl btn bts btt la- laa lab lal lan las lat lba lbb lbl lbs lbt lla llb lll lln lls llt lna lnb lnl lnn lns lnt lsa lsb lsl lsn lss lst lta ltb ltl lts ltt naa nab nal nan nas nat nba nbb nbl nbn nbs nbt nla nlb nll nln nls nlt nna nnb nnl nnn nns nnt nsa nsb nsl nsn nss nst nta ntb ntn nts ntt saa sab sal san sas sat sba sbb sbl sbn sbs sbt sla slb sll sln sls slt sna snb snl snn sns snt ss- ssa ssb ssl ssn sss sst sta stb stl stn sts stt taa tab tal tan tas tat tba tbb tbl tbn tbs tbt tla tll tln tls tlt tna tnb tnl tnn tns tnt tsa tsb tsl tsn tss tst tta ttb ttl ttn tts ttt