a-a a-b a-t aaa aab aae aag aao aap aat ab- aba abb abe abg abo abp abt aea aeb aee aeg aeo aep aet ag- aga agb age agg ago agp agt aoa aob aoe aog aoo aop aot ap- apa apb ape apg apo app apt at- ata atb ate atg ato atp att b-p baa bab bae bag bao bap bat bba bbb bbe bbg bbo bbp bbt be- bea beb bee beg beo bep bet bga bgb bge bgg bgo bgp bgt boa bob boe bog boo bop bot bpa bpb bpe bpg bpo bpp bpt bta btb bte btg bto btp btt eaa eab eae eag eao eap eat eba ebb ebe ebg ebo ebp ebt eea eeb eee eeg eeo eep eet ega egb ege egg ego egp egt eo- eoa eob eoe eog eoo eop eot ep- epa epb epe epg epo epp ept eta etb ete etg eto etp ett g-p gaa gab gae gag gao gap gat gba gbe gbg gbo gbp gbt ge- gea geb gee geg geo gep get gga ggb ggg ggo ggp ggt goa gob goe gog goo gop got gpa gpb gpe gpg gpo gpp gpt gta gtb gte gtg gto gtp gtt oaa oab oae oag oao oap oat ob- oba obb obe obg obo obp obt oea oeb oee oeg oeo oep oet oga oge ogg ogo ogp ogt oo- ooa oob oog ooo oop oot op- opa opb ope opg opo opp opt ot- ota otb ote otg oto otp ott p-p paa pab pae pag pao pap pat pba pbb pbe pbg pbo pbp pbt pea peb pee peg peo pep pet pga pgb pge pgg pgo pgp pgt poa pob poe pog poo pop pot ppa ppb ppe ppg ppo ppp ppt pt- pta ptb pte ptg pto ptp ptt taa tab tae tag tao tap tat tba tbb tbe tbg tbo tbp tbt te- tea teb tee teg teo tep tet tga tgb tge tgg tgo tgp tgt to- toa tob toe tog too top tot tpa tpb tpe tpg tpo tpp tpt tta ttb tte ttg tto ttp ttt