-al -ic a-a a-b a-c a-i aaa aab aac aaf aai aak aal aan aas ab- aba abb abc abf abi abk abl abn abs ac- aca acb acc acf aci ack acl acn acs af- afa afb afc aff afi afk afl afn afs ai- aia aib aic aif aii aik ail ain ais aka akb akc aki akk akl akn aks al- ala alb alc alf ali alk all aln als an- ana anb anc anf ani ank anl ann ans as- asa asb asc asf asi ask asl asn ass baa bab bac baf bai bak bal ban bas bba bbb bbc bbf bbi bbk bbl bbn bbs bca bcb bcc bcf bci bck bcl bcn bcs bfa bfb bfc bff bfi bfl bfn bfs bi- bia bib bic bif bii bik bil bin bis bka bkb bkc bkf bkk bkl bkn bks bla blb blc blf bli blk bll bln bls bna bnb bnc bnf bni bnk bnl bnn bns bsa bsb bsc bsf bsi bsk bsl bsn bss c-- caa cab cac caf cai cak cal can cas cba cbb cbc cbf cbi cbk cbl cbn cbs cca ccb ccc ccf cci cck ccl ccn ccs cfa cfb cfc cff cfi cfk cfl cfn cfs ci- cia cib cic cif cii cik cil cin cis cka ckb ckc cki cks cl- cla clb clc clf cli clk cll cln cls cn- cna cnb cnc cnf cni cnl cnn cns csa csb csc csf csi csk csl csn css faa fab fac faf fai fak fal fan fas fba fbb fbc fbf fbi fbk fbl fbn fbs fca fcb fcc fcf fci fck fcl fcn fcs ffa ffc fff ffi ffk ffl ffn ffs fia fib fic fif fii fik fil fin fis fka fkb fkc fkf fki fkk fkl fla flb flc flf fli fll fln fls fna fnb fnc fnf fni fnk fnl fnn fns fsa fsb fsc fsf fsi fsk fsl fsn fss i-f ia- iaa iab iac iaf iai ial ian ias iba ibb ibc ibf ibi ibk ibl ibn ibs ica icb icc icf ici ick icl icn ics ifa ifb ifc iff ifi ifl ifn ifs iia iib iic iif iii iil iin iis ika ikb ikc ikf iki ikk ikl iks il- ila ilb ilc ilf ili ilk ill iln ils in- ina inb inc inf ini ink inl inn ins is- isa isb isc isf isi isk isl isn iss ka- kaa kab kac kaf kai kak kal kan kas kba kbb kbc kbf kbi kbk kbl kbn kbs kca kcb kcc kci kck kcl kcn kcs kfa kfc kff kfi kfs kia kib kic kif kii kik kil kin kis kkb kkc kki kkk kkl kkn kks kl- kla klb klc klf kli kls kn- kna knc knf kni knk knl knn ksa ksb ksc ksf ksi ksk ksl ksn kss la- laa lab lac laf lai lak lal lan las lba lbb lbc lbf lbi lbk lbl lbs lca lcb lcc lcf lci lck lcl lcn lcs lfa lfb lfc lff lfi lfk lfl lfn lfs lia lib lic lif lii lik lil lin lis lka lkb lkl lks lla llb llc llf lli llk lll lln lls lna lnb lnc lni lnk lnl lnn lns lsa lsb lsc lsf lsi lsk lsl lsn lss n-i naa nab nac naf nai nak nal nan nas nba nbb nbc nbf nbi nbk nbl nbn nbs nca ncb ncc ncf nci nck ncl ncn ncs nfa nfb nfc nff nfi nfk nfl nfn nfs nia nib nic nif nii nik nil nin nis nka nkc nkf nki nkk nkn nks nla nlb nlc nlf nli nlk nll nln nls nna nnb nnc nnf nni nnk nnl nnn nns nsa nsb nsc nsf nsi nsk nsl nsn nss saa sab sac saf sai sak sal san sas sba sbb sbc sbf sbi sbk sbl sbn sbs sca scb scc scf sci sck scl scn scs sfa sfb sfc sff sfi sfk sfl sfn sfs sia sib sic sif sii sik sil sin sis sk- ska skb skc skf ski skk skl sks sla slb slc slf sli slk sll sln sls sna snb snc snf sni snk snl snn sns ss- ssa ssb ssc ssf ssi ssk ssl ssn sss