-ic a-a a-b a-c a-i aaa aab aac aag aai aak aan ab- aba abb abc abg abi abk abn ac- aca acb acc acg aci ack acn ag- aga agb agc agg agi agk agn ai- aia aib aic aig aii aik ain aka akb akc akg aki akk akn an- ana anb anc ang ani ank ann baa bab bac bag bai bak ban bba bbb bbc bbg bbi bbk bbn bca bcb bcc bcg bci bck bcn bga bgb bgc bgg bgi bgk bgn bi- bia bib bic big bii bik bin bka bkb bkc bkg bkk bkn bna bnb bnc bng bni bnk bnn c-- caa cab cac cag cai cak can cba cbb cbc cbg cbi cbk cbn cca ccb ccc ccg cci cck ccn cga cgb cgc cgg cgi cgn ci- cia cib cic cig cii cik cin cka ckb ckc cki cn- cna cnb cnc cng cni cnn gaa gab gac gag gai gak gan gba gbc gbg gbi gbk gbn gca gcb gcc gcg gci gck gcn gga ggb ggc ggg ggi ggn gia gib gic gig gii gik gin gka gkb gkn gna gnb gnc gni gnn ia- iaa iab iac iag iai ian iba ibb ibc ibg ibi ibk ibn ica icb icc icg ici ick icn iga igb igc igg igi igk ign iia iib iic iii iin ika ikb ikc iki ikk in- ina inb inc ing ini ink inn ka- kaa kab kac kag kai kak kan kba kbb kbc kbi kbk kbn kca kcb kcc kcg kci kck kcn kga kgb kgc kgi kia kib kic kig kii kik kin kkb kkc kki kkk kkn kn- kna knc kng kni knk knn n-i naa nab nac nag nai nak nan nba nbb nbc nbg nbi nbk nbn nca ncb ncc ncg nci nck ncn nga ngb ngc ngg ngi ngk ngn nia nib nic nig nii nik nin nka nkc nki nkk nkn nna nnb nnc nng nni nnk nnn