a-a a-b a-i a-t aaa aab aae aag aai aan aao aas aat ab- aba abb abe abg abi abn abo abs abt aea aeb aee aeg aei aen aeo aes aet ag- aga agb age agg agi agn ago ags agt ai- aia aib aie aig aii ain aio ais ait an- ana anb ane ang ani ann ano ans ant aoa aob aoe aog aoi aon aoo aos aot as- asa asb ase asg asi asn aso ass ast at- ata atb ate atg ati atn ato ats att baa bab bae bag bai ban bao bas bat bba bbb bbe bbg bbi bbn bbo bbs bbt be- bea beb bee beg bei ben beo bes bet bga bgb bge bgg bgi bgn bgo bgs bgt bi- bia bib bie big bii bin bio bis bit bna bnb bne bng bni bnn bno bns bnt boa bob boe bog boi bon boo bos bot bsa bsb bse bsg bsi bsn bso bss bst bta btb bte btg bti btn bto bts btt eaa eab eae eag eai ean eao eas eat eba ebb ebe ebg ebi ebn ebo ebs ebt eea eeb eee eeg een eeo ees eet ega egb ege egg egi egn ego egs egt eia eib eie eig eii ein eio eis eit en- ena enb ene eng eni enn eno ens ent eo- eoa eob eoe eog eoi eon eoo eos eot es- esa esb ese esg esi esn eso ess est eta etb ete etg eti etn eto ets ett gaa gab gae gag gai gan gao gas gat gba gbe gbg gbi gbn gbo gbs gbt ge- gea geb gee geg gei gen geo ges get gga ggb ggg ggi ggn ggo ggs ggt gia gib gie gig gii gin gio gis git gna gnb gne gni gnn gno gns gnt goa gob goe gog goi gon goo gos got gsa gsb gse gsg gsi gsn gso gss gst gta gtb gte gtg gti gtn gto gts gtt ia- iaa iab iae iag iai ian iao ias iat iba ibb ibe ibg ibi ibn ibo ibs ibt ie- iea iee ieg iei ien ies iet iga igb ige igg igi ign igo igs igt iia iib iie iii iin iio iis iit in- ina inb ine ing ini inn ino ins int io- ioa iob ioe iog ioi ion ioo ios iot is- isa isb ise isg isi isn iso iss ist ita itb ite itg iti itn ito its itt n-i naa nab nae nag nai nan nao nas nat nba nbb nbe nbg nbi nbn nbo nbs nbt ne- nea neb nee neg nei nen neo nes net nga ngb nge ngg ngi ngn ngo ngs ngt nia nib nie nig nii nin nio nis nit nna nnb nne nng nni nnn nno nns nnt no- noa nob noe nog noi non noo nos not nsa nsb nse nsg nsi nsn nso nss nst nta ntb nte ntg nti ntn nto nts ntt o-i oaa oab oae oag oai oan oao oas oat ob- oba obb obe obg obi obn obo obs obt oea oeb oee oeg oei oen oeo oes oet oga oge ogg ogi ogn ogo ogs ogt oia oib oie oii oin oio ois oit on- ona onb one ong oni onn ono ons ont oo- ooa oob oog ooi oon ooo oos oot os- osa osb ose osg osi osn oso oss ost ot- ota otb ote otg oti otn oto ots ott saa sab sae sag sai san sao sas sat sba sbb sbe sbg sbi sbn sbo sbs sbt se- sea seb see seg sei sen seo ses set sga sgb sge sgg sgi sgn sgo sgs sgt sia sib sie sig sii sin sio sis sit sna snb sne sng sni snn sno sns snt soa sob soe sog soi son soo sos sot ss- ssa ssb sse ssg ssi ssn sso sss sst sta stb ste stg sti stn sto sts stt taa tab tae tag tai tan tao tas tat tba tbb tbe tbg tbi tbn tbo tbs tbt te- tea teb tee teg tei ten teo tes tet tga tgb tge tgg tgi tgn tgo tgs tgt tia tib tie tig tii tin tio tis tit tna tnb tne tng tni tnn tno tns tnt to- toa tob toe tog toi ton too tos tot tsa tsb tse tsg tsi tsn tso tss tst tta ttb tte ttg tti ttn tto tts ttt