a-a a-b a-i aaa aab aae aai aak aam aan ab- aba abb abe abi abk abm abn aea aeb aee aei aek aem aen ai- aia aib aie aii aik aim ain aka akb ake aki akk akm akn ama amb ame ami amk amm amn an- ana anb ane ani ank anm ann baa bab bae bai bak bam ban bba bbb bbe bbi bbk bbm bbn be- bea beb bee bei bek bem ben bi- bia bib bie bii bik bim bin bka bkb bke bkk bkm bkn bma bmb bme bmi bmk bmm bmn bna bnb bne bni bnk bnn eaa eab eae eai eak eam ean eba ebb ebe ebi ebk ebm ebn eea eeb eee eek eem een eia eib eie eii eik eim ein eka ekb eke eki em- ema emb eme emi emk emm emn en- ena enb ene eni enk enm enn ia- iaa iab iae iai iam ian iba ibb ibe ibi ibk ibm ibn ie- iea iee iei iek iem ien iia iib iie iii iim iin ika ikb ike iki ikk im- ima imb ime imi imm imn in- ina inb ine ini ink inm inn ka- kaa kab kae kai kak kam kan kba kbb kbe kbi kbk kbm kbn ke- kea keb kee kei kek kem ken kia kib kie kii kik kim kin kkb kke kki kkk kkm kkn kma kmb kme kmi kmk kmm kn- kna kne kni knk knm knn maa mab mae mai mak mam man mba mbb mbe mbi mbk mbm mea meb mee mei mek mem men mi- mia mib mie mii mik mim min mka mkb mke mkk mkm mkn mma mmb mme mmi mmk mmm mmn mna mnb mne mni mnk mnm mnn n-i naa nab nae nai nak nam nan nba nbb nbe nbi nbk nbm nbn ne- nea neb nee nei nek nem nen nia nib nie nii nik nim nin nka nke nki nkk nkm nkn nma nmb nme nmi nmk nmm nmn nna nnb nne nni nnk nnm nnn