a-a a-b a-i aaa aab aae aag aai aak aam aan ab- aba abb abe abg abi abk abm abn aea aeb aee aeg aei aek aem aen ag- aga agb age agg agi agk agm agn ai- aia aib aie aig aii aik aim ain aka akb ake akg aki akk akm akn ama amb ame amg ami amk amm amn an- ana anb ane ang ani ank anm ann baa bab bae bag bai bak bam ban bba bbb bbe bbg bbi bbk bbm bbn be- bea beb bee beg bei bek bem ben bga bgb bge bgg bgi bgk bgm bgn bi- bia bib bie big bii bik bim bin bka bkb bke bkg bkk bkm bkn bma bmb bme bmg bmi bmk bmm bmn bna bnb bne bng bni bnk bnn eaa eab eae eag eai eak eam ean eba ebb ebe ebg ebi ebk ebm ebn eea eeb eee eeg eek eem een ega egb ege egg egi egm egn eia eib eie eig eii eik eim ein eka ekb eke ekg eki em- ema emb eme emg emi emk emm emn en- ena enb ene eng eni enk enm enn gaa gab gae gag gai gak gam gan gba gbe gbg gbi gbk gbm gbn ge- gea geb gee geg gei gek gem gen gga ggb ggg ggi ggm ggn gia gib gie gig gii gik gim gin gka gkb gkm gkn gma gmb gme gmg gmi gmm gmn gna gnb gne gni gnm gnn ia- iaa iab iae iag iai iam ian iba ibb ibe ibg ibi ibk ibm ibn ie- iea iee ieg iei iek iem ien iga igb ige igg igi igk igm ign iia iib iie iii iim iin ika ikb ike iki ikk im- ima imb ime img imi imm imn in- ina inb ine ing ini ink inm inn ka- kaa kab kae kag kai kak kam kan kba kbb kbe kbi kbk kbm kbn ke- kea keb kee keg kei kek kem ken kga kgb kgi kgm kia kib kie kig kii kik kim kin kkb kke kki kkk kkm kkn kma kmb kme kmg kmi kmk kmm kn- kna kne kng kni knk knm knn maa mab mae mag mai mak mam man mba mbb mbe mbg mbi mbk mbm mea meb mee meg mei mek mem men mga mgb mge mgi mgk mgm mgn mi- mia mib mie mig mii mik mim min mka mkb mke mkg mkk mkm mkn mma mmb mme mmg mmi mmk mmm mmn mna mnb mne mng mni mnk mnm mnn n-i naa nab nae nag nai nak nam nan nba nbb nbe nbg nbi nbk nbm nbn ne- nea neb nee neg nei nek nem nen nga ngb nge ngg ngi ngk ngm ngn nia nib nie nig nii nik nim nin nka nke nki nkk nkm nkn nma nmb nme nmg nmi nmk nmm nmn nna nnb nne nng nni nnk nnm nnn