-al a-a a-b a-t aaa aab aad aal aan aas aat ab- aba abb abd abl abn abs abt ad- ada adb add adl adn ads adt al- ala alb ald all aln als alt an- ana anb and anl ann ans ant as- asa asb asd asl asn ass ast at- ata atb atd atl atn ats att baa bab bad bal ban bas bat bba bbb bbd bbl bbn bbs bbt bda bdb bdd bdl bds bdt bla blb bld bll bln bls blt bna bnb bnd bnl bnn bns bnt bsa bsb bsd bsl bsn bss bst bta btb btd btl btn bts btt daa dab dad dal dan das dat dba dbb dbd dbl dbn dbs dbt dda ddb ddd ddl ddn dds ddt dl- dla dlb dld dll dls dlt dna dnb dnd dnl dnn dns dnt dsa dsb dsd dsl dsn dss dst dta dtb dtd dtl dtn dts dtt la- laa lab lad lal lan las lat lba lbb lbd lbl lbs lbt lda ldb ldd ldl ldn lds ldt lla llb lld lll lln lls llt lna lnb lnd lnl lnn lns lnt lsa lsb lsd lsl lsn lss lst lta ltb ltd ltl lts ltt naa nab nad nal nan nas nat nba nbb nbd nbl nbn nbs nbt nda ndb ndd ndl ndn nds ndt nla nlb nld nll nln nls nlt nna nnb nnl nnn nns nnt nsa nsb nsd nsl nsn nss nst nta ntb ntd ntn nts ntt saa sab sad sal san sas sat sba sbb sbd sbl sbn sbs sbt sda sdb sdd sdl sdn sds sdt sla slb sld sll sln sls slt sna snb snd snl snn sns snt ss- ssa ssb ssd ssl ssn sss sst sta stb std stl stn sts stt taa tab tad tal tan tas tat tba tbb tbd tbl tbn tbs tbt tda tdb tdd tdl tdn tds tdt tla tld tll tln tls tlt tna tnb tnd tnl tnn tns tnt tsa tsb tsd tsl tsn tss tst tta ttb ttd ttl ttn tts ttt