-er a-a aaa aae aak aam aar aax aea aee aek aem aer aex aka ake akk akm akr ama ame amk amm amr amx ar- ara are ark arm arr arx ax- axa axe axk axm axr axx eaa eae eak eam ear eax eea eee eek eem eer eex eka eke ekr em- ema eme emk emm emr emx era ere erk erm err ex- exa exe exr exx ka- kaa kae kak kam kar kax ke- kea kee kek kem ker kex kke kkk kkm kkr kma kme kmk kmm kra krk krr kxm m-r maa mae mak mam mar max mea mee mek mem mer mex mka mke mkk mkm mkr mkx mma mme mmk mmm mmr mmx mra mre mrk mrm mrr mrx mxa mxr ra- raa rae rak ram rar rax re- rea ree rek rem rer rex rke rkk rkm rma rme rmm rmr rmx rra rrk rrm rrr rxr xaa xak xam xar xee xem xer xex xke xma xmk xmm xmr xmx xrx xxx