a-a a-c aaa aac aae aah aao aap ac- aca acc ace ach aco acp aea aec aee aeh aeo aep aha ahc ahe ahh aho ahp aoa aoc aoe aoh aoo aop ap- apa apc ape aph apo app c-- caa cac cae cah cao cap cca ccc cce cch cco ccp ce- cea cec cee ceh ceo cep ch- cha chc che chh cho chp co- coa coc coe coh coo cop cpa cpc cpe cph cpo cpp eaa eac eae eah eao eap ec- eca ecc ece ech eco eea eec eee eeo eep eha ehc ehe ehh eho ehp eo- eoa eoc eoe eoh eoo eop ep- epa epc epe eph epo epp haa hac hae hah hao hap hca hcc hce hch hco hcp he- hea hec hee heh heo hep hha hhc hhe hhh hho hhp hoa hoc hoe hoh hoo hop hpa hpc hpe hph hpo hpp oaa oac oae oah oao oap oc- oca occ och oco ocp oea oec oee oeh oeo oep oha ohc ohe ohh oho ohp oo- ooa ooc ooh ooo oop op- opa opc ope oph opo opp p-p paa pac pae pah pao pap pca pcc pce pch pco pcp pea pec pee peh peo pep pha phc phe pho php poa poc poe poh poo pop ppa ppc ppe pph ppo ppp