-ic a-a a-b a-c a-i aaa aab aac aag aai aak aan aas ab- aba abb abc abg abi abk abn abs ac- aca acb acc acg aci ack acn acs ag- aga agb agc agg agi agk agn ags ai- aia aib aic aig aii aik ain ais aka akb akc akg aki akk akn aks an- ana anb anc ang ani ank ann ans as- asa asb asc asg asi ask asn ass baa bab bac bag bai bak ban bas bba bbb bbc bbg bbi bbk bbn bbs bca bcb bcc bcg bci bck bcn bcs bga bgb bgc bgg bgi bgk bgn bgs bi- bia bib bic big bii bik bin bis bka bkb bkc bkg bkk bkn bks bna bnb bnc bng bni bnk bnn bns bsa bsb bsc bsg bsi bsk bsn bss c-- caa cab cac cag cai cak can cas cba cbb cbc cbg cbi cbk cbn cbs cca ccb ccc ccg cci cck ccn ccs cga cgb cgc cgg cgi cgn cgs ci- cia cib cic cig cii cik cin cis cka ckb ckc cki cks cn- cna cnb cnc cng cni cnn cns csa csb csc csg csi csk csn css gaa gab gac gag gai gak gan gas gba gbc gbg gbi gbk gbn gbs gca gcb gcc gcg gci gck gcn gcs gga ggb ggc ggg ggi ggn ggs gia gib gic gig gii gik gin gis gka gkb gkn gks gna gnb gnc gni gnn gns gsa gsb gsc gsg gsi gsk gsn gss ia- iaa iab iac iag iai ian ias iba ibb ibc ibg ibi ibk ibn ibs ica icb icc icg ici ick icn ics iga igb igc igg igi igk ign igs iia iib iic iii iin iis ika ikb ikc iki ikk iks in- ina inb inc ing ini ink inn ins is- isa isb isc isg isi isk isn iss ka- kaa kab kac kag kai kak kan kas kba kbb kbc kbi kbk kbn kbs kca kcb kcc kcg kci kck kcn kcs kga kgb kgc kgi kgs kia kib kic kig kii kik kin kis kkb kkc kki kkk kkn kks kn- kna knc kng kni knk knn ksa ksb ksc ksg ksi ksk ksn kss n-i naa nab nac nag nai nak nan nas nba nbb nbc nbg nbi nbk nbn nbs nca ncb ncc ncg nci nck ncn ncs nga ngb ngc ngg ngi ngk ngn ngs nia nib nic nig nii nik nin nis nka nkc nki nkk nkn nks nna nnb nnc nng nni nnk nnn nns nsa nsb nsc nsg nsi nsk nsn nss saa sab sac sag sai sak san sas sba sbb sbc sbg sbi sbk sbn sbs sca scb scc scg sci sck scn scs sga sgb sgc sgg sgi sgk sgn sgs sia sib sic sig sii sik sin sis sk- ska skb skc skg ski skk sks sna snb snc sng sni snk snn sns ss- ssa ssb ssc ssg ssi ssk ssn sss