a-a aaa aam aan aap aax ama amm amn amp amx an- ana anm ann anp anx ap- apa apm apn app apx ax- axa axm axn axp axx maa mam man map max mma mmm mmn mmp mmx mna mnm mnn mnp mpa mpm mpn mpp mpx mxa mxn mxp naa nam nan nap nax nma nmm nmn nmp nna nnm nnn nnp npa npm npn npp p-p paa pam pan pap pax pma pmm pmn pmp pmx pn- pna pnm pnn pnp pnx ppa ppm ppn ppp ppx pxm xaa xam xan xap xma xmm xmp xmx xna xpa xpm xpn xpp xxp xxx