-er bbb bbe bbf bbg bbi bbr be- beb bee bef beg bei ber bfb bfe bff bfg bfi bfr bgb bge bgf bgg bgi bgr bi- bib bie bif big bii bir brb bre brf brg bri brr ebb ebe ebf ebg ebi ebr eeb eee eef eeg eer ef- efb efe eff efg efi efr egb ege egf egg egi egr eib eie eif eig eii eir erb ere erf erg eri err fbb fbe fbf fbg fbi fbr feb fee fef feg fei fer ffe fff ffg ffi ffr fgb fge fgf fgg fgi fgr fib fie fif fig fii fir frb fre frf frg fri frr gbe gbf gbg gbi gbr ge- geb gee gef geg gei ger gfb gfe gff gfi gfr ggb ggg ggi ggr gib gie gif gig gii gir grb gre grf grg gri grr i-f ibb ibe ibf ibg ibi ibr ie- iee ief ieg iei ier ifb ife iff ifg ifi ifr igb ige igf igg igi igr iib iie iif iii iir ir- irb ire irf irg iri irr rbb rbe rbf rbg rbi rbr re- reb ree ref reg rei rer rfb rfe rff rfg rfi rfr rgb rge rgf rgg rgi rgr rib rie rif rig rii rir rrb rrf rrg rri rrr