a-a a-c aaa aac aah aao aap aas ac- aca acc ach aco acp acs aha ahc ahh aho ahp ahs aoa aoc aoh aoo aop aos ap- apa apc aph apo app aps as- asa asc ash aso asp ass c-- caa cac cah cao cap cas cca ccc cch cco ccp ccs ch- cha chc chh cho chp chs co- coa coc coh coo cop cos cpa cpc cph cpo cpp cps csa csc csh cso csp css haa hac hah hao hap has hca hcc hch hco hcp hcs hha hhc hhh hho hhp hhs hoa hoc hoh hoo hop hos hpa hpc hph hpo hpp hps hsa hsc hsh hsp hss oaa oac oah oao oap oas oc- oca occ och oco ocp ocs oha ohc ohh oho ohp ohs oo- ooa ooc ooh ooo oop oos op- opa opc oph opo opp ops os- osa osc osh oso osp oss p-p paa pac pah pao pap pas pca pcc pch pco pcp pcs pha phc pho php phs poa poc poh poo pop pos ppa ppc pph ppo ppp pps ps- psa psc psh pso psp pss saa sac sah sao sap sas sca scc sch sco scp scs sh- sha shc shh sho shp shs soa soc soh soo sop sos spa spc sph spo spp sps ss- ssa ssc ssh sso ssp sss