a-a a-b a-i aaa aab aae aag aai aak aan ab- aba abb abe abg abi abk abn aea aeb aee aeg aei aek aen ag- aga agb age agg agi agk agn ai- aia aib aie aig aii aik ain aka akb ake akg aki akk akn an- ana anb ane ang ani ank ann baa bab bae bag bai bak ban bba bbb bbe bbg bbi bbk bbn be- bea beb bee beg bei bek ben bga bgb bge bgg bgi bgk bgn bi- bia bib bie big bii bik bin bka bkb bke bkg bkk bkn bna bnb bne bng bni bnk bnn eaa eab eae eag eai eak ean eba ebb ebe ebg ebi ebk ebn eea eeb eee eeg eek een ega egb ege egg egi egn eia eib eie eig eii eik ein eka ekb eke ekg eki en- ena enb ene eng eni enk enn gaa gab gae gag gai gak gan gba gbe gbg gbi gbk gbn ge- gea geb gee geg gei gek gen gga ggb ggg ggi ggn gia gib gie gig gii gik gin gka gkb gkn gna gnb gne gni gnn ia- iaa iab iae iag iai ian iba ibb ibe ibg ibi ibk ibn ie- iea iee ieg iei iek ien iga igb ige igg igi igk ign iia iib iie iii iin ika ikb ike iki ikk in- ina inb ine ing ini ink inn ka- kaa kab kae kag kai kak kan kba kbb kbe kbi kbk kbn ke- kea keb kee keg kei kek ken kga kgb kgi kia kib kie kig kii kik kin kkb kke kki kkk kkn kn- kna kne kng kni knk knn n-i naa nab nae nag nai nak nan nba nbb nbe nbg nbi nbk nbn ne- nea neb nee neg nei nek nen nga ngb nge ngg ngi ngk ngn nia nib nie nig nii nik nin nka nke nki nkk nkn nna nnb nne nng nni nnk nnn