a-a a-b a-i a-t aaa aab aae aag aai aan aas aat ab- aba abb abe abg abi abn abs abt aea aeb aee aeg aei aen aes aet ag- aga agb age agg agi agn ags agt ai- aia aib aie aig aii ain ais ait an- ana anb ane ang ani ann ans ant as- asa asb ase asg asi asn ass ast at- ata atb ate atg ati atn ats att baa bab bae bag bai ban bas bat bba bbb bbe bbg bbi bbn bbs bbt be- bea beb bee beg bei ben bes bet bga bgb bge bgg bgi bgn bgs bgt bi- bia bib bie big bii bin bis bit bna bnb bne bng bni bnn bns bnt bsa bsb bse bsg bsi bsn bss bst bta btb bte btg bti btn bts btt eaa eab eae eag eai ean eas eat eba ebb ebe ebg ebi ebn ebs ebt eea eeb eee eeg een ees eet ega egb ege egg egi egn egs egt eia eib eie eig eii ein eis eit en- ena enb ene eng eni enn ens ent es- esa esb ese esg esi esn ess est eta etb ete etg eti etn ets ett gaa gab gae gag gai gan gas gat gba gbe gbg gbi gbn gbs gbt ge- gea geb gee geg gei gen ges get gga ggb ggg ggi ggn ggs ggt gia gib gie gig gii gin gis git gna gnb gne gni gnn gns gnt gsa gsb gse gsg gsi gsn gss gst gta gtb gte gtg gti gtn gts gtt ia- iaa iab iae iag iai ian ias iat iba ibb ibe ibg ibi ibn ibs ibt ie- iea iee ieg iei ien ies iet iga igb ige igg igi ign igs igt iia iib iie iii iin iis iit in- ina inb ine ing ini inn ins int is- isa isb ise isg isi isn iss ist ita itb ite itg iti itn its itt n-i naa nab nae nag nai nan nas nat nba nbb nbe nbg nbi nbn nbs nbt ne- nea neb nee neg nei nen nes net nga ngb nge ngg ngi ngn ngs ngt nia nib nie nig nii nin nis nit nna nnb nne nng nni nnn nns nnt nsa nsb nse nsg nsi nsn nss nst nta ntb nte ntg nti ntn nts ntt saa sab sae sag sai san sas sat sba sbb sbe sbg sbi sbn sbs sbt se- sea seb see seg sei sen ses set sga sgb sge sgg sgi sgn sgs sgt sia sib sie sig sii sin sis sit sna snb sne sng sni snn sns snt ss- ssa ssb sse ssg ssi ssn sss sst sta stb ste stg sti stn sts stt taa tab tae tag tai tan tas tat tba tbb tbe tbg tbi tbn tbs tbt te- tea teb tee teg tei ten tes tet tga tgb tge tgg tgi tgn tgs tgt tia tib tie tig tii tin tis tit tna tnb tne tng tni tnn tns tnt tsa tsb tse tsg tsi tsn tss tst tta ttb tte ttg tti ttn tts ttt