a-a a-b a-i a-t aaa aab aae aag aai aao aas aat ab- aba abb abe abg abi abo abs abt aea aeb aee aeg aei aeo aes aet ag- aga agb age agg agi ago ags agt ai- aia aib aie aig aii aio ais ait aoa aob aoe aog aoi aoo aos aot as- asa asb ase asg asi aso ass ast at- ata atb ate atg ati ato ats att baa bab bae bag bai bao bas bat bba bbb bbe bbg bbi bbo bbs bbt be- bea beb bee beg bei beo bes bet bga bgb bge bgg bgi bgo bgs bgt bi- bia bib bie big bii bio bis bit boa bob boe bog boi boo bos bot bsa bsb bse bsg bsi bso bss bst bta btb bte btg bti bto bts btt eaa eab eae eag eai eao eas eat eba ebb ebe ebg ebi ebo ebs ebt eea eeb eee eeg eeo ees eet ega egb ege egg egi ego egs egt eia eib eie eig eii eio eis eit eo- eoa eob eoe eog eoi eoo eos eot es- esa esb ese esg esi eso ess est eta etb ete etg eti eto ets ett gaa gab gae gag gai gao gas gat gba gbe gbg gbi gbo gbs gbt ge- gea geb gee geg gei geo ges get gga ggb ggg ggi ggo ggs ggt gia gib gie gig gii gio gis git goa gob goe gog goi goo gos got gsa gsb gse gsg gsi gso gss gst gta gtb gte gtg gti gto gts gtt ia- iaa iab iae iag iai iao ias iat iba ibb ibe ibg ibi ibo ibs ibt ie- iea iee ieg iei ies iet iga igb ige igg igi igo igs igt iia iib iie iii iio iis iit io- ioa iob ioe iog ioi ioo ios iot is- isa isb ise isg isi iso iss ist ita itb ite itg iti ito its itt o-i oaa oab oae oag oai oao oas oat ob- oba obb obe obg obi obo obs obt oea oeb oee oeg oei oeo oes oet oga oge ogg ogi ogo ogs ogt oia oib oie oii oio ois oit oo- ooa oob oog ooi ooo oos oot os- osa osb ose osg osi oso oss ost ot- ota otb ote otg oti oto ots ott saa sab sae sag sai sao sas sat sba sbb sbe sbg sbi sbo sbs sbt se- sea seb see seg sei seo ses set sga sgb sge sgg sgi sgo sgs sgt sia sib sie sig sii sio sis sit soa sob soe sog soi soo sos sot ss- ssa ssb sse ssg ssi sso sss sst sta stb ste stg sti sto sts stt taa tab tae tag tai tao tas tat tba tbb tbe tbg tbi tbo tbs tbt te- tea teb tee teg tei teo tes tet tga tgb tge tgg tgi tgo tgs tgt tia tib tie tig tii tio tis tit to- toa tob toe tog toi too tos tot tsa tsb tse tsg tsi tso tss tst tta ttb tte ttg tti tto tts ttt