-er b-u bbb bbe bbf bbg bbi bbr bbu be- beb bee bef beg bei ber beu bfb bfe bff bfg bfi bfr bfu bgb bge bgf bgg bgi bgr bgu bi- bib bie bif big bii bir biu brb bre brf brg bri brr bru bub bue buf bug bui bur buu ebb ebe ebf ebg ebi ebr ebu eeb eee eef eeg eer ef- efb efe eff efg efi efr egb ege egf egg egi egr egu eib eie eif eig eii eir eiu erb ere erf erg eri err eru eu- eub eue euf eug eui eur fbb fbe fbf fbg fbi fbr fbu feb fee fef feg fei fer feu ffe fff ffg ffi ffr ffu fgb fge fgf fgg fgi fgr fib fie fif fig fii fir fiu frb fre frf frg fri frr fru fub fue fuf fug fui fur fuu gbe gbf gbg gbi gbr gbu ge- geb gee gef geg gei ger geu gfb gfe gff gfi gfr ggb ggg ggi ggr ggu gib gie gif gig gii gir giu grb gre grf grg gri grr gru gu- gub gue guf gug gui gur guu i-f ibb ibe ibf ibg ibi ibr ibu ie- iee ief ieg iei ier ifb ife iff ifg ifi ifr ifu igb ige igf igg igi igr igu iib iie iif iii iir iiu ir- irb ire irf irg iri irr iru iu- iub iue iug iui iur rbb rbe rbf rbg rbi rbr rbu re- reb ree ref reg rei rer reu rfb rfe rff rfg rfi rfr rfu rgb rge rgf rgg rgi rgr rib rie rif rig rii rir rrb rrf rrg rri rrr rru rub rue ruf rug rui rur ruu ubb ube ubf ubg ubi ubr ubu ueb uee uef ueg uei uer ufe uff ufg ufi ufr ufu ugb uge ugf ugg ugi ugr ugu uib uie uif uig uii uir uiu ur- urb ure urf urg uri urr uru uue uug uur uuu