a-a a-c aaa aac aah aan aao aap ac- aca acc ach acn aco acp aha ahc ahh ahn aho ahp an- ana anc anh ann ano anp aoa aoc aoh aon aoo aop ap- apa apc aph apn apo app c-- caa cac cah can cao cap cca ccc cch ccn cco ccp ch- cha chc chh chn cho chp cn- cna cnc cnh cnn cno cnp co- coa coc coh con coo cop cpa cpc cph cpn cpo cpp haa hac hah han hao hap hca hcc hch hcn hco hcp hha hhc hhh hhn hho hhp hna hnc hnh hnn hno hoa hoc hoh hon hoo hop hpa hpc hph hpn hpo hpp naa nac nah nan nao nap nca ncc nch ncn nco ncp nha nhc nhh nhn nhp nna nnc nnh nnn nno nnp no- noa noc noh non noo nop npa npc nph npn npo npp oaa oac oah oan oao oap oc- oca occ och ocn oco ocp oha ohc ohh ohn oho ohp on- ona onc onh onn ono onp oo- ooa ooc ooh oon ooo oop op- opa opc oph opn opo opp p-p paa pac pah pan pao pap pca pcc pch pcn pco pcp pha phc phn pho php pn- pna pnc pnh pnn pno pnp poa poc poh pon poo pop ppa ppc pph ppn ppo ppp