bbb bbe bbg bbi bbs be- beb bee beg bei bes bgb bge bgg bgi bgs bi- bib bie big bii bis bsb bse bsg bsi bss ebb ebe ebg ebi ebs eeb eee eeg ees egb ege egg egi egs eib eie eig eii eis es- esb ese esg esi ess gbe gbg gbi gbs ge- geb gee geg gei ges ggb ggg ggi ggs gib gie gig gii gis gsb gse gsg gsi gss ibb ibe ibg ibi ibs ie- iee ieg iei ies igb ige igg igi igs iib iie iii iis is- isb ise isg isi iss sbb sbe sbg sbi sbs se- seb see seg sei ses sgb sge sgg sgi sgs sib sie sig sii sis ss- ssb sse ssg ssi sss