bbb bbe bbg bbi bbm be- beb bee beg bei bem bgb bge bgg bgi bgm bi- bib bie big bii bim bmb bme bmg bmi bmm ebb ebe ebg ebi ebm eeb eee eeg eem egb ege egg egi egm eib eie eig eii eim em- emb eme emg emi emm gbe gbg gbi gbm ge- geb gee geg gei gem ggb ggg ggi ggm gib gie gig gii gim gmb gme gmg gmi gmm ibb ibe ibg ibi ibm ie- iee ieg iei iem igb ige igg igi igm iib iie iii iim im- imb ime img imi imm mbb mbe mbg mbi mbm meb mee meg mei mem mgb mge mgi mgm mi- mib mie mig mii mim mmb mme mmg mmi mmm