-ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aak aan aat ab- aba abb abc abe abg abi abk abn abt ac- aca acb acc ace acg aci ack acn act aea aeb aec aee aeg aei aek aen aet ag- aga agb agc age agg agi agk agn agt ai- aia aib aic aie aig aii aik ain ait aka akb akc ake akg aki akk akn an- ana anb anc ane ang ani ank ann ant at- ata atb atc ate atg ati atn att baa bab bac bae bag bai bak ban bat bba bbb bbc bbe bbg bbi bbk bbn bbt bca bcb bcc bce bcg bci bck bcn bct be- bea beb bec bee beg bei bek ben bet bga bgb bgc bge bgg bgi bgk bgn bgt bi- bia bib bic bie big bii bik bin bit bka bkb bkc bke bkg bkk bkn bkt bna bnb bnc bne bng bni bnk bnn bnt bta btb btc bte btg bti btk btn btt c-- caa cab cac cae cag cai cak can cat cba cbb cbc cbe cbg cbi cbk cbn cbt cca ccb ccc cce ccg cci cck ccn cct ce- cea ceb cec cee ceg cei cek cen cet cga cgb cgc cge cgg cgi cgn cgt ci- cia cib cic cie cig cii cik cin cit cka ckb ckc cki ckt cn- cna cnb cnc cne cng cni cnn cnt cta ctb ctc cte ctg cti ctk ctn ctt eaa eab eac eae eag eai eak ean eat eba ebb ebc ebe ebg ebi ebk ebn ebt ec- eca ecb ecc ece ecg eci eck ecn ect eea eeb eec eee eeg eek een eet ega egb egc ege egg egi egn egt eia eib eic eie eig eii eik ein eit eka ekb ekc eke ekg eki ekt en- ena enb enc ene eng eni enk enn ent eta etb etc ete etg eti etk etn ett gaa gab gac gae gag gai gak gan gat gba gbc gbe gbg gbi gbk gbn gbt gca gcb gcc gce gcg gci gck gcn gct ge- gea geb gec gee geg gei gek gen get gga ggb ggc ggg ggi ggn ggt gia gib gic gie gig gii gik gin git gka gkb gkn gkt gna gnb gnc gne gni gnn gnt gta gtb gtc gte gtg gti gtk gtn gtt ia- iaa iab iac iae iag iai ian iat iba ibb ibc ibe ibg ibi ibk ibn ibt ica icb icc ice icg ici ick icn ict ie- iea iec iee ieg iei iek ien iet iga igb igc ige igg igi igk ign igt iia iib iic iie iii iin iit ika ikb ikc ike iki ikk ikt in- ina inb inc ine ing ini ink inn int ita itb itc ite itg iti itk itn itt k-t ka- kaa kab kac kae kag kai kak kan kat kba kbb kbc kbe kbi kbk kbn kca kcb kcc kce kcg kci kck kcn kct ke- kea keb kec kee keg kei kek ken ket kga kgb kgc kgi kia kib kic kie kig kii kik kin kit kkb kkc kke kki kkk kkn kkt kn- kna knc kne kng kni knk knn knt kta ktb ktc kte ktg ktk ktn ktt n-i naa nab nac nae nag nai nak nan nat nba nbb nbc nbe nbg nbi nbk nbn nbt nca ncb ncc nce ncg nci nck ncn nct ne- nea neb nec nee neg nei nek nen net nga ngb ngc nge ngg ngi ngk ngn ngt nia nib nic nie nig nii nik nin nit nka nkc nke nki nkk nkn nkt nna nnb nnc nne nng nni nnk nnn nnt nta ntb ntc nte ntg nti ntk ntn ntt taa tab tac tae tag tai tak tan tat tba tbb tbc tbe tbg tbi tbk tbn tbt tca tcb tcc tce tcg tci tck tcn tct te- tea teb tec tee teg tei tek ten tet tga tgb tgc tge tgg tgi tgk tgn tgt tia tib tic tie tig tii tik tin tit tka tkb tkc tke tkg tkk tkt tna tnb tnc tne tng tni tnk tnn tnt tta ttb ttc tte ttg tti ttk ttn ttt