a-a a-b a-i aaa aab aae aag aai aak aam ab- aba abb abe abg abi abk abm aea aeb aee aeg aei aek aem ag- aga agb age agg agi agk agm ai- aia aib aie aig aii aik aim aka akb ake akg aki akk akm ama amb ame amg ami amk amm baa bab bae bag bai bak bam bba bbb bbe bbg bbi bbk bbm be- bea beb bee beg bei bek bem bga bgb bge bgg bgi bgk bgm bi- bia bib bie big bii bik bim bka bkb bke bkg bkk bkm bma bmb bme bmg bmi bmk bmm eaa eab eae eag eai eak eam eba ebb ebe ebg ebi ebk ebm eea eeb eee eeg eek eem ega egb ege egg egi egm eia eib eie eig eii eik eim eka ekb eke ekg eki em- ema emb eme emg emi emk emm gaa gab gae gag gai gak gam gba gbe gbg gbi gbk gbm ge- gea geb gee geg gei gek gem gga ggb ggg ggi ggm gia gib gie gig gii gik gim gka gkb gkm gma gmb gme gmg gmi gmm ia- iaa iab iae iag iai iam iba ibb ibe ibg ibi ibk ibm ie- iea iee ieg iei iek iem iga igb ige igg igi igk igm iia iib iie iii iim ika ikb ike iki ikk im- ima imb ime img imi imm ka- kaa kab kae kag kai kak kam kba kbb kbe kbi kbk kbm ke- kea keb kee keg kei kek kem kga kgb kgi kgm kia kib kie kig kii kik kim kkb kke kki kkk kkm kma kmb kme kmg kmi kmk kmm maa mab mae mag mai mak mam mba mbb mbe mbg mbi mbk mbm mea meb mee meg mei mek mem mga mgb mge mgi mgk mgm mi- mia mib mie mig mii mik mim mka mkb mke mkg mkk mkm mma mmb mme mmg mmi mmk mmm