bbb bbe bbg bbi bbl be- beb bee beg bei bel bgb bge bgg bgi bgl bi- bib bie big bii bil blb ble blg bli bll ebb ebe ebg ebi ebl eeb eee eeg eel egb ege egg egi egl eib eie eig eii eil elb ele elg eli ell gbe gbg gbi gbl ge- geb gee geg gei gel ggb ggg ggi gib gie gig gii gil glb gle glg gli gll ibb ibe ibg ibi ibl ie- iee ieg iei iel igb ige igg igi igl iib iie iii iil il- ilb ile ilg ili ill lbb lbe lbg lbi lbl leb lee leg lei lel lgb lge lgg lgi lgl lib lie lig lii lil llb lle llg lli lll