-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aao aat ab- aba abb abc abg abi abn abo abt ac- aca acb acc acg aci acn aco act ag- aga agb agc agg agi agn ago agt ai- aia aib aic aig aii ain aio ait an- ana anb anc ang ani ann ano ant aoa aob aoc aog aoi aon aoo aot at- ata atb atc atg ati atn ato att baa bab bac bag bai ban bao bat bba bbb bbc bbg bbi bbn bbo bbt bca bcb bcc bcg bci bcn bco bct bga bgb bgc bgg bgi bgn bgo bgt bi- bia bib bic big bii bin bio bit bna bnb bnc bng bni bnn bno bnt boa bob boc bog boi bon boo bot bta btb btc btg bti btn bto btt c-- caa cab cac cag cai can cao cat cba cbb cbc cbg cbi cbn cbo cbt cca ccb ccc ccg cci ccn cco cct cga cgb cgc cgg cgi cgn cgo cgt ci- cia cib cic cig cii cin cio cit cn- cna cnb cnc cng cni cnn cno cnt co- coa cob coc cog coi con coo cot cta ctb ctc ctg cti ctn cto ctt gaa gab gac gag gai gan gao gat gba gbc gbg gbi gbn gbo gbt gca gcb gcc gcg gci gcn gco gct gga ggb ggc ggg ggi ggn ggo ggt gia gib gic gig gii gin gio git gna gnb gnc gni gnn gno gnt goa gob goc gog goi gon goo got gta gtb gtc gtg gti gtn gto gtt ia- iaa iab iac iag iai ian iao iat iba ibb ibc ibg ibi ibn ibo ibt ica icb icc icg ici icn ico ict iga igb igc igg igi ign igo igt iia iib iic iii iin iio iit in- ina inb inc ing ini inn ino int io- ioa iob ioc iog ioi ion ioo iot ita itb itc itg iti itn ito itt n-i naa nab nac nag nai nan nao nat nba nbb nbc nbg nbi nbn nbo nbt nca ncb ncc ncg nci ncn nco nct nga ngb ngc ngg ngi ngn ngo ngt nia nib nic nig nii nin nio nit nna nnb nnc nng nni nnn nno nnt no- noa nob noc nog noi non noo not nta ntb ntc ntg nti ntn nto ntt o-i oaa oab oac oag oai oan oao oat ob- oba obb obc obg obi obn obo obt oc- oca ocb occ ocg oci ocn oco oct oga ogc ogg ogi ogn ogo ogt oia oib oic oii oin oio oit on- ona onb onc ong oni onn ono ont oo- ooa oob ooc oog ooi oon ooo oot ot- ota otb otc otg oti otn oto ott taa tab tac tag tai tan tao tat tba tbb tbc tbg tbi tbn tbo tbt tca tcb tcc tcg tci tcn tco tct tga tgb tgc tgg tgi tgn tgo tgt tia tib tic tig tii tin tio tit tna tnb tnc tng tni tnn tno tnt to- toa tob toc tog toi ton too tot tta ttb ttc ttg tti ttn tto ttt