a-a a-z aaa aae aam aao aap aax aaz aea aee aem aeo aep aex aez ama ame amm amo amp amx amz aoa aoe aom aoo aop aox ap- apa ape apm apo app apx ax- axa axe axm axo axp axx az- aza aze azm azo azp azx azz eaa eae eam eao eap eax eaz eea eee eem eeo eep eex em- ema eme emm emo emp emx eo- eoa eoe eom eoo eop ep- epa epe epm epo epp epx epz ex- exa exe exo exp exx eze ezo ezz m-o maa mae mam mao map max maz mea mee mem meo mep mex mez mma mme mmm mmo mmp mmx mmz moa moe mom moo mop mox moz mpa mpe mpm mpo mpp mpx mxa mxp mza mzm mzp mzx oaa oae oam oao oap oax oea oee oem oeo oep oex om- oma ome omm omo omp omx omz oo- ooa oom ooo oop oox op- opa ope opm opo opp opx ox- oxa oxo oxx oza oze ozm ozo ozz p-p paa pae pam pao pap pax paz pea pee pem peo pep pex pez pma pme pmm pmo pmp pmx pmz poa poe pom poo pop pox poz ppa ppe ppm ppo ppp ppx ppz pxe pxm pzm pzp xaa xam xap xee xem xep xex xma xmm xmo xmp xmx xoa xom xoo xop xox xpa xpe xpm xpo xpp xxo xxp xxx zaa zam zao zap zax zaz zea zee zem zeo zep zez zma zmm zmp zo- zoa zoe zom zoo zox zpe zpm zpo zpp zxx zzx zzz