a-a a-b a-i a-t aaa aab aag aai aan aao aar aas aat ab- aba abb abg abi abn abo abr abs abt ag- aga agb agg agi agn ago agr ags agt ai- aia aib aig aii ain aio air ais ait an- ana anb ang ani ann ano anr ans ant aoa aob aog aoi aon aoo aor aos aot ar- ara arb arg ari arn aro arr ars art as- asa asb asg asi asn aso asr ass ast at- ata atb atg ati atn ato atr ats att baa bab bag bai ban bao bar bas bat bba bbb bbg bbi bbn bbo bbr bbs bbt bga bgb bgg bgi bgn bgo bgr bgs bgt bi- bia bib big bii bin bio bir bis bit bna bnb bng bni bnn bno bnr bns bnt boa bob bog boi bon boo bor bos bot bra brb brg bri brn bro brr brs brt bsa bsb bsg bsi bsn bso bsr bss bst bta btb btg bti btn bto btr bts btt gaa gab gag gai gan gao gar gas gat gba gbg gbi gbn gbo gbr gbs gbt gga ggb ggg ggi ggn ggo ggr ggs ggt gia gib gig gii gin gio gir gis git gna gnb gni gnn gno gnr gns gnt goa gob gog goi gon goo gor gos got gra grb grg gri grn gro grr grs grt gsa gsb gsg gsi gsn gso gsr gss gst gta gtb gtg gti gtn gto gtr gts gtt ia- iaa iab iag iai ian iao iar ias iat iba ibb ibg ibi ibn ibo ibr ibs ibt iga igb igg igi ign igo igr igs igt iia iib iii iin iio iir iis iit in- ina inb ing ini inn ino inr ins int io- ioa iob iog ioi ion ioo ior ios iot ir- ira irb irg iri irn iro irr irs irt is- isa isb isg isi isn iso isr iss ist ita itb itg iti itn ito its itt n-i naa nab nag nai nan nao nar nas nat nba nbb nbg nbi nbn nbo nbr nbs nbt nga ngb ngg ngi ngn ngo ngs ngt nia nib nig nii nin nio nir nis nit nna nnb nng nni nnn nno nns nnt no- noa nob nog noi non noo nor nos not nra nrb nrg nri nrn nro nrr nrs nrt nsa nsb nsg nsi nsn nso nsr nss nst nta ntb ntg nti ntn nto ntr nts ntt o-i oaa oab oag oai oan oao oar oas oat ob- oba obb obg obi obn obo obr obs obt oga ogg ogi ogn ogo ogs ogt oia oib oii oin oio oir ois oit on- ona onb ong oni onn ono onr ons ont oo- ooa oob oog ooi oon ooo oor oos oot or- ora orb org ori orn oro orr ors ort os- osa osb osg osi osn oso osr oss ost ot- ota otb otg oti otn oto otr ots ott ra- raa rab rag rai ran rao rar ras rat rba rbb rbg rbi rbn rbo rbr rbs rbt rga rgb rgg rgi rgn rgo rgr rgs rgt ria rib rig rii rin rio rir ris rit rna rnb rng rni rnn rno rnr rns rnt roa rob rog roi ron roo ror ros rot rra rrb rrg rri rrn rrr rrs rrt rsa rsb rsg rsi rsn rso rsr rss rst rta rtb rtg rti rtn rto rtr rts rtt saa sab sag sai san sao sar sas sat sba sbb sbg sbi sbn sbo sbr sbs sbt sga sgb sgg sgi sgn sgo sgr sgs sgt sia sib sig sii sin sio sir sis sit sna snb sng sni snn sno snr sns snt soa sob sog soi son soo sor sos sot sr- sra srb srg sri srn sro srr srs srt ss- ssa ssb ssg ssi ssn sso ssr sss sst sta stb stg sti stn sto str sts stt taa tab tag tai tan tao tar tas tat tba tbb tbg tbi tbn tbo tbr tbs tbt tga tgb tgg tgi tgn tgo tgr tgs tgt tia tib tig tii tin tio tir tis tit tna tnb tng tni tnn tno tnr tns tnt to- toa tob tog toi ton too tor tos tot tra trb trg tri trn tro trr trs trt tsa tsb tsg tsi tsn tso tsr tss tst tta ttb ttg tti ttn tto ttr tts ttt