a-a aaa aam aao aap aar aax ama amm amo amp amr amx aoa aom aoo aop aor aox ap- apa apm apo app apr apx ar- ara arm aro arp arr arx ax- axa axm axo axp axr axx m-o m-r maa mam mao map mar max mma mmm mmo mmp mmr mmx moa mom moo mop mor mox mpa mpm mpo mpp mpr mpx mra mrm mro mrp mrr mrx mxa mxp mxr oaa oam oao oap oar oax om- oma omm omo omp omr omx oo- ooa oom ooo oop oor oox op- opa opm opo opp opr opx or- ora orm oro orp orr orx ox- oxa oxo oxx p-p paa pam pao pap par pax pma pmm pmo pmp pmr pmx poa pom poo pop por pox ppa ppm ppo ppp ppr ppx pra prm pro prp prr prx pxm pxr ra- raa ram rao rap rar rax rma rmm rmo rmp rmr rmx roa rom roo rop ror rox rpa rpm rpo rpp rpr rpx rra rrm rrp rrr rxp rxr xaa xam xap xar xma xmm xmo xmp xmr xmx xoa xom xoo xop xor xox xpa xpm xpo xpp xrx xxo xxp xxx