a-a aaa aah aao aap aas aha ahh aho ahp ahs aoa aoh aoo aop aos ap- apa aph apo app aps as- asa ash aso asp ass haa hah hao hap has hha hhh hho hhp hhs hoa hoh hoo hop hos hpa hph hpo hpp hps hsa hsh hsp hss oaa oah oao oap oas oha ohh oho ohp ohs oo- ooa ooh ooo oop oos op- opa oph opo opp ops os- osa osh oso osp oss p-p paa pah pao pap pas pha pho php phs poa poh poo pop pos ppa pph ppo ppp pps ps- psa psh pso psp pss saa sah sao sap sas sh- sha shh sho shp shs soa soh soo sop sos spa sph spo spp sps ss- ssa ssh sso ssp sss