a-a a-b aaa aab aae aag aak aao aap ab- aba abb abe abg abk abo abp aea aeb aee aeg aek aeo aep ag- aga agb age agg agk ago agp aka akb ake akg akk ako akp aoa aob aoe aog aok aoo aop ap- apa apb ape apg apk apo app b-p baa bab bae bag bak bao bap bba bbb bbe bbg bbk bbo bbp be- bea beb bee beg bek beo bep bga bgb bge bgg bgk bgo bgp bka bkb bke bkg bkk bko bkp boa bob boe bog bok boo bop bpa bpb bpe bpg bpo bpp eaa eab eae eag eak eao eap eba ebb ebe ebg ebk ebo ebp eea eeb eee eeg eek eeo eep ega egb ege egg ego egp eka ekb eke ekg eko ekp eo- eoa eob eoe eog eok eoo eop ep- epa epb epe epg epo epp g-p gaa gab gae gag gak gao gap gba gbe gbg gbk gbo gbp ge- gea geb gee geg gek geo gep gga ggb ggg ggo ggp gka gkb gko gkp goa gob goe gog gok goo gop gpa gpb gpe gpg gpk gpo gpp ka- kaa kab kae kag kak kao kap kba kbb kbe kbk kbo kbp ke- kea keb kee keg kek keo kep kga kgb kgo kgp kkb kke kkk kkp koa kob koe kog kok koo kop kpa kpe kpk kpo kpp oaa oab oae oag oak oao oap ob- oba obb obe obg obk obo obp oea oeb oee oeg oeo oep oga oge ogg ogo ogp oka okb oke okg okk oko okp oo- ooa oob oog ook ooo oop op- opa opb ope opg opk opo opp p-p paa pab pae pag pak pao pap pba pbb pbe pbg pbk pbo pbp pea peb pee peg pek peo pep pga pgb pge pgg pgk pgo pgp pka pkb pke pkg pko pkp poa pob poe pog pok poo pop ppa ppb ppe ppg ppk ppo ppp