a-a a-b a-i aaa aab aad aae aag aai aan ab- aba abb abd abe abg abi abn ad- ada adb add ade adg adi adn aea aeb aed aee aeg aei aen ag- aga agb agd age agg agi agn ai- aia aib aid aie aig aii ain an- ana anb and ane ang ani ann baa bab bad bae bag bai ban bba bbb bbd bbe bbg bbi bbn bda bdb bdd bde bdg bdi be- bea beb bed bee beg bei ben bga bgb bgd bge bgg bgi bgn bi- bia bib bid bie big bii bin bna bnb bnd bne bng bni bnn daa dab dad dae dag dai dan dba dbb dbd dbe dbg dbi dbn dda ddb ddd dde ddg ddi ddn de- dea deb ded dee deg dei den dga dgd dge dgg dgi dgn di- dia dib did die dig dii din dna dnb dnd dne dng dni dnn eaa eab ead eae eag eai ean eba ebb ebd ebe ebg ebi ebn ed- eda edb edd ede edg edi edn eea eeb eed eee eeg een ega egb egd ege egg egi egn eia eib eid eie eig eii ein en- ena enb end ene eng eni enn g-d gaa gab gad gae gag gai gan gba gbd gbe gbg gbi gbn gda gdb gdd gde gdi gdn ge- gea geb ged gee geg gei gen gga ggb ggd ggg ggi ggn gia gib gid gie gig gii gin gna gnb gnd gne gni gnn i-d ia- iaa iab iad iae iag iai ian iba ibb ibd ibe ibg ibi ibn ida idb idd ide idg idi idn ie- iea ied iee ieg iei ien iga igb igd ige igg igi ign iia iib iid iie iii iin in- ina inb ind ine ing ini inn n-i naa nab nad nae nag nai nan nba nbb nbd nbe nbg nbi nbn nda ndb ndd nde ndg ndi ndn ne- nea neb ned nee neg nei nen nga ngb ngd nge ngg ngi ngn nia nib nid nie nig nii nin nna nnb nne nng nni nnn