bbb bbf bbg bbi bbm bfb bff bfg bfi bfm bgb bgf bgg bgi bgm bi- bib bif big bii bim bmb bmf bmg bmi bmm fbb fbf fbg fbi fbm fff ffg ffi ffm fgb fgf fgg fgi fgm fib fif fig fii fim fmb fmf fmg fmi fmm gbf gbg gbi gbm gfb gff gfi gfm ggb ggg ggi ggm gib gif gig gii gim gmb gmf gmg gmi gmm i-f ibb ibf ibg ibi ibm ifb iff ifg ifi ifm igb igf igg igi igm iib iif iii iim im- imb imf img imi imm m-f mbb mbf mbg mbi mbm mfb mff mfg mfi mfm mgb mgf mgi mgm mi- mib mif mig mii mim mmb mmf mmg mmi mmm