a-a aaa aah aao aap aar aax aha ahh aho ahp ahr ahx aoa aoh aoo aop aor aox ap- apa aph apo app apr apx ar- ara arh aro arp arr arx ax- axa axh axo axp axr axx haa hah hao hap har hax hha hhh hho hhp hhr hoa hoh hoo hop hor hox hpa hph hpo hpp hpr hr- hra hrh hro hrp hrr oaa oah oao oap oar oax oha ohh oho ohp ohr oo- ooa ooh ooo oop oor oox op- opa oph opo opp opr opx or- ora orh oro orp orr orx ox- oxa oxo oxx p-p paa pah pao pap par pax pha pho php phr phx poa poh poo pop por pox ppa pph ppo ppp ppr ppx pra prh pro prp prr prx pxr ra- raa rah rao rap rar rax rh- rha rhh rho rhp rhr roa roh roo rop ror rox rpa rph rpo rpp rpr rpx rra rrh rrp rrr rxp rxr xaa xap xar xhp xoa xoo xop xor xox xpa xpo xpp xrx xxo xxp xxx