-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aam aan aar aat ab- aba abb abc abg abi abm abn abr abt ac- aca acb acc acg aci acm acn acr act ag- aga agb agc agg agi agm agn agr agt ai- aia aib aic aig aii aim ain air ait ama amb amc amg ami amm amn amr amt an- ana anb anc ang ani anm ann anr ant ar- ara arb arc arg ari arm arn arr art at- ata atb atc atg ati atm atn atr att baa bab bac bag bai bam ban bar bat bba bbb bbc bbg bbi bbm bbn bbr bbt bca bcb bcc bcg bci bcm bcn bcr bct bga bgb bgc bgg bgi bgm bgn bgr bgt bi- bia bib bic big bii bim bin bir bit bma bmb bmc bmg bmi bmm bmn bmr bmt bna bnb bnc bng bni bnn bnr bnt bra brb brg bri brm brn brr brt bta btb btc btg bti btm btn btr btt c-- caa cab cac cag cai cam can car cat cba cbb cbc cbg cbi cbm cbn cbr cbt cca ccb ccc ccg cci ccm ccn ccr cct cga cgb cgc cgg cgi cgm cgn cgr cgt ci- cia cib cic cig cii cim cin cir cit cma cmb cmc cmg cmi cmm cmn cmr cmt cn- cna cnb cnc cng cni cnm cnn cnr cnt cra crb crc crg cri crm crn crr crt cta ctb ctc ctg cti ctm ctn ctr ctt gaa gab gac gag gai gam gan gar gat gba gbc gbg gbi gbm gbn gbr gbt gca gcb gcc gcg gci gcm gcn gcr gct gga ggb ggc ggg ggi ggm ggn ggr ggt gia gib gic gig gii gim gin gir git gma gmb gmc gmg gmi gmm gmn gmr gmt gna gnb gnc gni gnm gnn gnr gnt gra grb grc grg gri grm grn grr grt gta gtb gtc gtg gti gtm gtn gtr gtt ia- iaa iab iac iag iai iam ian iar iat iba ibb ibc ibg ibi ibm ibn ibr ibt ica icb icc icg ici icm icn icr ict iga igb igc igg igi igm ign igr igt iia iib iic iii iim iin iir iit im- ima imb imc img imi imm imn imt in- ina inb inc ing ini inm inn inr int ir- ira irb irc irg iri irm irn irr irt ita itb itc itg iti itm itn itt m-r maa mab mac mag mai mam man mar mat mba mbb mbc mbg mbi mbm mbr mbt mc- mca mcb mcc mcg mci mcm mcn mcr mct mga mgb mgc mgi mgm mgn mgr mgt mi- mia mib mic mig mii mim min mir mit mma mmb mmc mmg mmi mmm mmn mmr mmt mna mnb mnc mng mni mnm mnn mnr mnt mra mrb mrc mrg mri mrm mrn mrr mrt mta mtb mtc mtg mti mtm mtn mtr mtt n-i naa nab nac nag nai nam nan nar nat nba nbb nbc nbg nbi nbm nbn nbr nbt nca ncb ncc ncg nci ncm ncn ncr nct nga ngb ngc ngg ngi ngm ngn ngt nia nib nic nig nii nim nin nir nit nma nmb nmc nmg nmi nmm nmn nmr nmt nna nnb nnc nng nni nnm nnn nnt nra nrb nrc nrg nri nrm nrn nrr nrt nta ntb ntc ntg nti ntm ntn ntr ntt ra- raa rab rac rag rai ram ran rar rat rba rbb rbc rbg rbi rbm rbn rbr rbt rca rcb rcc rcg rci rcm rcn rcr rct rga rgb rgc rgg rgi rgn rgr rgt ria rib ric rig rii rim rin rir rit rma rmb rmc rmg rmi rmm rmn rmr rmt rna rnb rnc rng rni rnm rnn rnr rnt rra rrb rrc rrg rri rrm rrn rrr rrt rta rtb rtc rtg rti rtm rtn rtr rtt taa tab tac tag tai tam tan tar tat tba tbb tbc tbg tbi tbm tbn tbr tbt tca tcb tcc tcg tci tcm tcn tcr tct tga tgb tgc tgg tgi tgm tgn tgr tgt tia tib tic tig tii tim tin tir tit tma tmb tmc tmg tmi tmm tmn tmr tmt tna tnb tnc tng tni tnm tnn tnr tnt tra trb trc trg tri trm trn trr trt tta ttb ttc ttg tti ttm ttn ttr ttt