a-a a-b a-c aaa aab aac aae aah aan aao aap ab- aba abb abc abe abh abn abo abp ac- aca acb acc ace ach acn aco acp aea aeb aec aee aeh aen aeo aep aha ahb ahc ahe ahh ahn aho ahp an- ana anb anc ane anh ann ano anp aoa aob aoc aoe aoh aon aoo aop ap- apa apb apc ape aph apn apo app b-p baa bab bac bae bah ban bao bap bba bbb bbc bbe bbh bbn bbo bbp bca bcb bcc bce bch bcn bco bcp be- bea beb bec bee beh ben beo bep bha bhb bhc bhe bhh bho bhp bna bnb bnc bne bnn bno bnp boa bob boc boe boh bon boo bop bpa bpb bpc bpe bph bpn bpo bpp c-- caa cab cac cae cah can cao cap cba cbb cbc cbe cbh cbn cbo cbp cca ccb ccc cce cch ccn cco ccp ce- cea ceb cec cee ceh cen ceo cep ch- cha chb chc che chh chn cho chp cn- cna cnb cnc cne cnh cnn cno cnp co- coa cob coc coe coh con coo cop cpa cpb cpc cpe cph cpn cpo cpp eaa eab eac eae eah ean eao eap eba ebb ebc ebe ebh ebn ebo ebp ec- eca ecb ecc ece ech ecn eco eea eeb eec eee een eeo eep eha ehb ehc ehe ehh ehn eho ehp en- ena enb enc ene enh enn eno enp eo- eoa eob eoc eoe eoh eon eoo eop ep- epa epb epc epe eph epn epo epp haa hab hac hae hah han hao hap hba hbb hbc hbe hbh hbn hbo hbp hca hcb hcc hce hch hcn hco hcp he- hea heb hec hee heh hen heo hep hha hhb hhc hhe hhh hhn hho hhp hna hnb hnc hne hnh hnn hno hoa hob hoc hoe hoh hon hoo hop hpa hpb hpc hpe hph hpn hpo hpp naa nab nac nae nah nan nao nap nba nbb nbc nbe nbn nbo nbp nca ncb ncc nce nch ncn nco ncp ne- nea neb nec nee neh nen neo nep nha nhb nhc nhe nhh nhn nhp nna nnb nnc nne nnh nnn nno nnp no- noa nob noc noe noh non noo nop npa npb npc npe nph npn npo npp oaa oab oac oae oah oan oao oap ob- oba obb obc obe obh obn obo obp oc- oca ocb occ och ocn oco ocp oea oeb oec oee oeh oen oeo oep oha ohc ohe ohh ohn oho ohp on- ona onb onc one onh onn ono onp oo- ooa oob ooc ooh oon ooo oop op- opa opb opc ope oph opn opo opp p-p paa pab pac pae pah pan pao pap pba pbb pbc pbe pbn pbo pbp pca pcb pcc pce pch pcn pco pcp pea peb pec pee peh pen peo pep pha phb phc phe phn pho php pn- pna pnb pnc pne pnh pnn pno pnp poa pob poc poe poh pon poo pop ppa ppb ppc ppe pph ppn ppo ppp