a-a a-b a-i a-t aaa aab aag aai aao aap aat ab- aba abb abg abi abo abp abt ag- aga agb agg agi ago agp agt ai- aia aib aig aii aio aip ait aoa aob aog aoi aoo aop aot ap- apa apb apg api apo app apt at- ata atb atg ati ato atp att b-p baa bab bag bai bao bap bat bba bbb bbg bbi bbo bbp bbt bga bgb bgg bgi bgo bgp bgt bi- bia bib big bii bio bip bit boa bob bog boi boo bop bot bpa bpb bpg bpi bpo bpp bpt bta btb btg bti bto btp btt g-p gaa gab gag gai gao gap gat gba gbg gbi gbo gbp gbt gga ggb ggg ggi ggo ggp ggt gia gib gig gii gio gip git goa gob gog goi goo gop got gpa gpb gpg gpi gpo gpp gpt gta gtb gtg gti gto gtp gtt ia- iaa iab iag iai iao iap iat iba ibb ibg ibi ibo ibp ibt iga igb igg igi igo igp igt iia iib iii iio iip iit io- ioa iob iog ioi ioo iop iot ipa ipb ipg ipi ipo ipp ipt ita itb itg iti ito itp itt o-i oaa oab oag oai oao oap oat ob- oba obb obg obi obo obp obt oga ogg ogi ogo ogp ogt oia oib oii oio oip oit oo- ooa oob oog ooi ooo oop oot op- opa opb opg opi opo opp opt ot- ota otb otg oti oto otp ott p-p paa pab pag pai pao pap pat pba pbb pbg pbi pbo pbp pbt pga pgb pgg pgi pgo pgp pgt pia pib pig pii pio pip pit poa pob pog poi poo pop pot ppa ppb ppg ppi ppo ppp ppt pt- pta ptb ptg pti pto ptp ptt taa tab tag tai tao tap tat tba tbb tbg tbi tbo tbp tbt tga tgb tgg tgi tgo tgp tgt tia tib tig tii tio tip tit to- toa tob tog toi too top tot tpa tpb tpg tpi tpo tpp tpt tta ttb ttg tti tto ttp ttt