a-a a-b aaa aab aae aah aan aao aap ab- aba abb abe abh abn abo abp aea aeb aee aeh aen aeo aep aha ahb ahe ahh ahn aho ahp an- ana anb ane anh ann ano anp aoa aob aoe aoh aon aoo aop ap- apa apb ape aph apn apo app b-p baa bab bae bah ban bao bap bba bbb bbe bbh bbn bbo bbp be- bea beb bee beh ben beo bep bha bhb bhe bhh bho bhp bna bnb bne bnn bno bnp boa bob boe boh bon boo bop bpa bpb bpe bph bpn bpo bpp eaa eab eae eah ean eao eap eba ebb ebe ebh ebn ebo ebp eea eeb eee een eeo eep eha ehb ehe ehh ehn eho ehp en- ena enb ene enh enn eno enp eo- eoa eob eoe eoh eon eoo eop ep- epa epb epe eph epn epo epp haa hab hae hah han hao hap hba hbb hbe hbh hbn hbo hbp he- hea heb hee heh hen heo hep hha hhb hhe hhh hhn hho hhp hna hnb hne hnh hnn hno hoa hob hoe hoh hon hoo hop hpa hpb hpe hph hpn hpo hpp naa nab nae nah nan nao nap nba nbb nbe nbn nbo nbp ne- nea neb nee neh nen neo nep nha nhb nhe nhh nhn nhp nna nnb nne nnh nnn nno nnp no- noa nob noe noh non noo nop npa npb npe nph npn npo npp oaa oab oae oah oan oao oap ob- oba obb obe obh obn obo obp oea oeb oee oeh oen oeo oep oha ohe ohh ohn oho ohp on- ona onb one onh onn ono onp oo- ooa oob ooh oon ooo oop op- opa opb ope oph opn opo opp p-p paa pab pae pah pan pao pap pba pbb pbe pbn pbo pbp pea peb pee peh pen peo pep pha phb phe phn pho php pn- pna pnb pne pnh pnn pno pnp poa pob poe poh pon poo pop ppa ppb ppe pph ppn ppo ppp