-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aao aar aas aat ab- aba abb abc abg abi abn abo abr abs abt ac- aca acb acc acg aci acn aco acr acs act ag- aga agb agc agg agi agn ago agr ags agt ai- aia aib aic aig aii ain aio air ais ait an- ana anb anc ang ani ann ano anr ans ant aoa aob aoc aog aoi aon aoo aor aos aot ar- ara arb arc arg ari arn aro arr ars art as- asa asb asc asg asi asn aso asr ass ast at- ata atb atc atg ati atn ato atr ats att baa bab bac bag bai ban bao bar bas bat bba bbb bbc bbg bbi bbn bbo bbr bbs bbt bca bcb bcc bcg bci bcn bco bcr bcs bct bga bgb bgc bgg bgi bgn bgo bgr bgs bgt bi- bia bib bic big bii bin bio bir bis bit bna bnb bnc bng bni bnn bno bnr bns bnt boa bob boc bog boi bon boo bor bos bot bra brb brg bri brn bro brr brs brt bsa bsb bsc bsg bsi bsn bso bsr bss bst bta btb btc btg bti btn bto btr bts btt c-- caa cab cac cag cai can cao car cas cat cba cbb cbc cbg cbi cbn cbo cbr cbs cbt cca ccb ccc ccg cci ccn cco ccr ccs cct cga cgb cgc cgg cgi cgn cgo cgr cgs cgt ci- cia cib cic cig cii cin cio cir cis cit cn- cna cnb cnc cng cni cnn cno cnr cns cnt co- coa cob coc cog coi con coo cor cos cot cra crb crc crg cri crn cro crr crs crt csa csb csc csg csi csn cso csr css cst cta ctb ctc ctg cti ctn cto ctr cts ctt gaa gab gac gag gai gan gao gar gas gat gba gbc gbg gbi gbn gbo gbr gbs gbt gca gcb gcc gcg gci gcn gco gcr gcs gct gga ggb ggc ggg ggi ggn ggo ggr ggs ggt gia gib gic gig gii gin gio gir gis git gna gnb gnc gni gnn gno gnr gns gnt goa gob goc gog goi gon goo gor gos got gra grb grc grg gri grn gro grr grs grt gsa gsb gsc gsg gsi gsn gso gsr gss gst gta gtb gtc gtg gti gtn gto gtr gts gtt ia- iaa iab iac iag iai ian iao iar ias iat iba ibb ibc ibg ibi ibn ibo ibr ibs ibt ica icb icc icg ici icn ico icr ics ict iga igb igc igg igi ign igo igr igs igt iia iib iic iii iin iio iir iis iit in- ina inb inc ing ini inn ino inr ins int io- ioa iob ioc iog ioi ion ioo ior ios iot ir- ira irb irc irg iri irn iro irr irs irt is- isa isb isc isg isi isn iso isr iss ist ita itb itc itg iti itn ito its itt n-i naa nab nac nag nai nan nao nar nas nat nba nbb nbc nbg nbi nbn nbo nbr nbs nbt nca ncb ncc ncg nci ncn nco ncr ncs nct nga ngb ngc ngg ngi ngn ngo ngs ngt nia nib nic nig nii nin nio nir nis nit nna nnb nnc nng nni nnn nno nns nnt no- noa nob noc nog noi non noo nor nos not nra nrb nrc nrg nri nrn nro nrr nrs nrt nsa nsb nsc nsg nsi nsn nso nsr nss nst nta ntb ntc ntg nti ntn nto ntr nts ntt o-i oaa oab oac oag oai oan oao oar oas oat ob- oba obb obc obg obi obn obo obr obs obt oc- oca ocb occ ocg oci ocn oco ocr ocs oct oga ogc ogg ogi ogn ogo ogs ogt oia oib oic oii oin oio oir ois oit on- ona onb onc ong oni onn ono onr ons ont oo- ooa oob ooc oog ooi oon ooo oor oos oot or- ora orb orc org ori orn oro orr ors ort os- osa osb osc osg osi osn oso osr oss ost ot- ota otb otc otg oti otn oto otr ots ott ra- raa rab rac rag rai ran rao rar ras rat rba rbb rbc rbg rbi rbn rbo rbr rbs rbt rca rcb rcc rcg rci rcn rco rcr rcs rct rga rgb rgc rgg rgi rgn rgo rgr rgs rgt ria rib ric rig rii rin rio rir ris rit rna rnb rnc rng rni rnn rno rnr rns rnt roa rob roc rog roi ron roo ror ros rot rra rrb rrc rrg rri rrn rrr rrs rrt rsa rsb rsc rsg rsi rsn rso rsr rss rst rta rtb rtc rtg rti rtn rto rtr rts rtt saa sab sac sag sai san sao sar sas sat sba sbb sbc sbg sbi sbn sbo sbr sbs sbt sca scb scc scg sci scn sco scr scs sct sga sgb sgc sgg sgi sgn sgo sgr sgs sgt sia sib sic sig sii sin sio sir sis sit sna snb snc sng sni snn sno snr sns snt soa sob soc sog soi son soo sor sos sot sr- sra srb src srg sri srn sro srr srs srt ss- ssa ssb ssc ssg ssi ssn sso ssr sss sst sta stb stc stg sti stn sto str sts stt taa tab tac tag tai tan tao tar tas tat tba tbb tbc tbg tbi tbn tbo tbr tbs tbt tca tcb tcc tcg tci tcn tco tcr tcs tct tga tgb tgc tgg tgi tgn tgo tgr tgs tgt tia tib tic tig tii tin tio tir tis tit tna tnb tnc tng tni tnn tno tnr tns tnt to- toa tob toc tog toi ton too tor tos tot tra trb trc