-ic a-a a-b a-c a-i a-t aaa aab aac aag aai aan aao aat aau ab- aba abb abc abg abi abn abo abt abu ac- aca acb acc acg aci acn aco act acu ag- aga agb agc agg agi agn ago agt agu ai- aia aib aic aig aii ain aio ait aiu an- ana anb anc ang ani ann ano ant anu aoa aob aoc aog aoi aon aoo aot aou at- ata atb atc atg ati atn ato att atu au- aua aub auc aug aui aun auo aut b-u baa bab bac bag bai ban bao bat bau bba bbb bbc bbg bbi bbn bbo bbt bbu bca bcb bcc bcg bci bcn bco bct bcu bga bgb bgc bgg bgi bgn bgo bgt bgu bi- bia bib bic big bii bin bio bit biu bna bnb bnc bng bni bnn bno bnt bnu boa bob boc bog boi bon boo bot bou bta btb btc btg bti btn bto btt btu bua bub buc bug bui bun buo but buu c-- caa cab cac cag cai can cao cat cau cba cbb cbc cbg cbi cbn cbo cbt cbu cca ccb ccc ccg cci ccn cco cct ccu cga cgb cgc cgg cgi cgn cgo cgt cgu ci- cia cib cic cig cii cin cio cit ciu cn- cna cnb cnc cng cni cnn cno cnt cnu co- coa cob coc cog coi con coo cot cou cta ctb ctc ctg cti ctn cto ctt ctu cua cub cuc cug cui cun cuo cut cuu gaa gab gac gag gai gan gao gat gau gba gbc gbg gbi gbn gbo gbt gbu gca gcb gcc gcg gci gcn gco gct gcu gga ggb ggc ggg ggi ggn ggo ggt ggu gia gib gic gig gii gin gio git giu gna gnb gnc gni gnn gno gnt gnu goa gob goc gog goi gon goo got gou gta gtb gtc gtg gti gtn gto gtt gtu gu- gua gub guc gug gui gun guo gut guu ia- iaa iab iac iag iai ian iao iat iau iba ibb ibc ibg ibi ibn ibo ibt ibu ica icb icc icg ici icn ico ict icu iga igb igc igg igi ign igo igt igu iia iib iic iii iin iio iit iiu in- ina inb inc ing ini inn ino int inu io- ioa iob ioc iog ioi ion ioo iot iou ita itb itc itg iti itn ito itt itu iu- iua iub iuc iug iui iut n-i naa nab nac nag nai nan nao nat nau nba nbb nbc nbg nbi nbn nbo nbt nbu nca ncb ncc ncg nci ncn nco nct ncu nga ngb ngc ngg ngi ngn ngo ngt ngu nia nib nic nig nii nin nio nit niu nna nnb nnc nng nni nnn nno nnt nnu no- noa nob noc nog noi non noo not nou nta ntb ntc ntg nti ntn nto ntt ntu nua nub nuc nug nui nun nuo nut nuu o-i oaa oab oac oag oai oan oao oat oau ob- oba obb obc obg obi obn obo obt obu oc- oca ocb occ ocg oci ocn oco oct ocu oga ogc ogg ogi ogn ogo ogt oia oib oic oii oin oio oit oiu on- ona onb onc ong oni onn ono ont onu oo- ooa oob ooc oog ooi oon ooo oot ot- ota otb otc otg oti otn oto ott otu ou- oua ouc oui oun ouo out taa tab tac tag tai tan tao tat tau tba tbb tbc tbg tbi tbn tbo tbt tbu tca tcb tcc tcg tci tcn tco tct tcu tga tgb tgc tgg tgi tgn tgo tgt tgu tia tib tic tig tii tin tio tit tiu tna tnb tnc tng tni tnn tno tnt to- toa tob toc tog toi ton too tot tou tta ttb ttc ttg tti ttn tto ttt ttu tua tub tuc tug tui tun tuo tut tuu ua- uaa uab uac uag uai uan uao uat uau uba ubb ubc ubg ubi ubn ubo ubt ubu uca ucb ucc ucg uci ucn uco uct ucu uga ugb ugc ugg ugi ugn ugo ugt ugu uia uib uic uig uii uin uio uit uiu un- una unb unc ung uni unn uno unt unu uoa uob uoc uog uon uoo uot uta utb utc uti utn uto utt utu uua uuc uug uun uut uuu