-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aak aan aao aat ab- aba abb abc abg abi abk abn abo abt ac- aca acb acc acg aci ack acn aco act ag- aga agb agc agg agi agk agn ago agt ai- aia aib aic aig aii aik ain aio ait aka akb akc akg aki akk akn ako an- ana anb anc ang ani ank ann ano ant aoa aob aoc aog aoi aok aon aoo aot at- ata atb atc atg ati atn ato att baa bab bac bag bai bak ban bao bat bba bbb bbc bbg bbi bbk bbn bbo bbt bca bcb bcc bcg bci bck bcn bco bct bga bgb bgc bgg bgi bgk bgn bgo bgt bi- bia bib bic big bii bik bin bio bit bka bkb bkc bkg bkk bkn bko bkt bna bnb bnc bng bni bnk bnn bno bnt boa bob boc bog boi bok bon boo bot bta btb btc btg bti btk btn bto btt c-- caa cab cac cag cai cak can cao cat cba cbb cbc cbg cbi cbk cbn cbo cbt cca ccb ccc ccg cci cck ccn cco cct cga cgb cgc cgg cgi cgn cgo cgt ci- cia cib cic cig cii cik cin cio cit cka ckb ckc cki cko ckt cn- cna cnb cnc cng cni cnn cno cnt co- coa cob coc cog coi cok con coo cot cta ctb ctc ctg cti ctk ctn cto ctt gaa gab gac gag gai gak gan gao gat gba gbc gbg gbi gbk gbn gbo gbt gca gcb gcc gcg gci gck gcn gco gct gga ggb ggc ggg ggi ggn ggo ggt gia gib gic gig gii gik gin gio git gka gkb gkn gko gkt gna gnb gnc gni gnn gno gnt goa gob goc gog goi gok gon goo got gta gtb gtc gtg gti gtk gtn gto gtt ia- iaa iab iac iag iai ian iao iat iba ibb ibc ibg ibi ibk ibn ibo ibt ica icb icc icg ici ick icn ico ict iga igb igc igg igi igk ign igo igt iia iib iic iii iin iio iit ika ikb ikc iki ikk iko ikt in- ina inb inc ing ini ink inn ino int io- ioa iob ioc iog ioi ion ioo iot ita itb itc itg iti itk itn ito itt k-t ka- kaa kab kac kag kai kak kan kao kat kba kbb kbc kbi kbk kbn kbo kca kcb kcc kcg kci kck kcn kct kga kgb kgc kgi kgo kia kib kic kig kii kik kin kio kit kkb kkc kki kkk kkn kkt kn- kna knc kng kni knk knn kno knt koa kob koc kog koi kok kon koo kot kta ktb ktc ktg ktk ktn kto ktt n-i naa nab nac nag nai nak nan nao nat nba nbb nbc nbg nbi nbk nbn nbo nbt nca ncb ncc ncg nci nck ncn nco nct nga ngb ngc ngg ngi ngk ngn ngo ngt nia nib nic nig nii nik nin nio nit nka nkc nki nkk nkn nko nkt nna nnb nnc nng nni nnk nnn nno nnt no- noa nob noc nog noi nok non noo not nta ntb ntc ntg nti ntk ntn nto ntt o-i oaa oab oac oag oai oak oan oao oat ob- oba obb obc obg obi obk obn obo obt oc- oca ocb occ ocg oci ock ocn oco oct oga ogc ogg ogi ogn ogo ogt oia oib oic oii oik oin oio oit oka okb okc okg oki okk oko on- ona onb onc ong oni onk onn ono ont oo- ooa oob ooc oog ooi ook oon ooo oot ot- ota otb otc otg oti otk otn oto ott taa tab tac tag tai tak tan tao tat tba tbb tbc tbg tbi tbk tbn tbo tbt tca tcb tcc tcg tci tck tcn tco tct tga tgb tgc tgg tgi tgk tgn tgo tgt tia tib tic tig tii tik tin tio tit tka tkb tkc tkg tkk tko tkt tna tnb tnc tng tni tnk tnn tno tnt to- toa tob toc tog toi tok ton too tot tta ttb ttc ttg tti ttk ttn tto ttt