-al a-a a-b a-t aaa aab aae aak aal aan aas aat ab- aba abb abe abk abl abn abs abt aea aeb aee aek ael aen aes aet aka akb ake akk akl akn aks al- ala alb ale alk all aln als alt an- ana anb ane ank anl ann ans ant as- asa asb ase ask asl asn ass ast at- ata atb ate atl atn ats att baa bab bae bak bal ban bas bat bba bbb bbe bbk bbl bbn bbs bbt be- bea beb bee bek bel ben bes bet bka bkb bke bkk bkl bkn bks bkt bla blb ble blk bll bln bls blt bna bnb bne bnk bnl bnn bns bnt bsa bsb bse bsk bsl bsn bss bst bta btb bte btk btl btn bts btt eaa eab eae eak eal ean eas eat eba ebb ebe ebk ebl ebn ebs ebt eea eeb eee eek eel een ees eet eka ekb eke ekl eks ekt ela elb ele elk ell eln els elt en- ena enb ene enk enl enn ens ent es- esa esb ese esk esl esn ess est eta etb ete etk etl etn ets ett k-t ka- kaa kab kae kak kal kan kas kat kba kbb kbe kbk kbl kbn kbs ke- kea keb kee kek kel ken kes ket kkb kke kkk kkl kkn kks kkt kl- kla klb kls klt kn- kna kne knk knl knn knt ksa ksb kse ksk ksl ksn kss kst kta ktb kte ktk ktl ktn kts ktt la- laa lab lae lak lal lan las lat lba lbb lbe lbk lbl lbs lbt lea leb lee lek lel len les let lka lkb lkl lks lkt lla llb lle llk lll lln lls llt lna lnb lne lnk lnl lnn lns lnt lsa lsb lse lsk lsl lsn lss lst lta ltb lte ltk ltl lts ltt naa nab nae nak nal nan nas nat nba nbb nbe nbk nbl nbn nbs nbt ne- nea neb nee nek nel nen nes net nka nke nkk nkn nks nkt nla nlb nle nlk nll nln nls nlt nna nnb nne nnk nnl nnn nns nnt nsa nsb nse nsk nsl nsn nss nst nta ntb nte ntk ntn nts ntt saa sab sae sak sal san sas sat sba sbb sbe sbk sbl sbn sbs sbt se- sea seb see sek sel sen ses set sk- ska skb ske skk skl sks skt sla slb sle slk sll sln sls slt sna snb sne snk snl snn sns snt ss- ssa ssb sse ssk ssl ssn sss sst sta stb ste stk stl stn sts stt taa tab tae tak tal tan tas tat tba tbb tbe tbk tbl tbn tbs tbt te- tea teb tee tek tel ten tes tet tka tkb tke tkk tkl tks tkt tla tle tlk tll tln tls tlt tna tnb tne tnk tnl tnn tns tnt tsa tsb tse tsk tsl tsn tss tst tta ttb tte ttk ttl ttn tts ttt