a-a a-b a-i aaa aab aae aai aak aam ab- aba abb abe abi abk abm aea aeb aee aei aek aem ai- aia aib aie aii aik aim aka akb ake aki akk akm ama amb ame ami amk amm baa bab bae bai bak bam bba bbb bbe bbi bbk bbm be- bea beb bee bei bek bem bi- bia bib bie bii bik bim bka bkb bke bkk bkm bma bmb bme bmi bmk bmm eaa eab eae eai eak eam eba ebb ebe ebi ebk ebm eea eeb eee eek eem eia eib eie eii eik eim eka ekb eke eki em- ema emb eme emi emk emm ia- iaa iab iae iai iam iba ibb ibe ibi ibk ibm ie- iea iee iei iek iem iia iib iie iii iim ika ikb ike iki ikk im- ima imb ime imi imm ka- kaa kab kae kai kak kam kba kbb kbe kbi kbk kbm ke- kea keb kee kei kek kem kia kib kie kii kik kim kkb kke kki kkk kkm kma kmb kme kmi kmk kmm maa mab mae mai mak mam mba mbb mbe mbi mbk mbm mea meb mee mei mek mem mi- mia mib mie mii mik mim mka mkb mke mkk mkm mma mmb mme mmi mmk mmm