-er bbb bbe bbf bbi bbr bbt be- beb bee bef bei ber bet bfb bfe bff bfi bfr bft bi- bib bie bif bii bir bit brb bre brf bri brr brt btb bte btf bti btr btt ebb ebe ebf ebi ebr ebt eeb eee eef eer eet ef- efb efe eff efi efr eft eib eie eif eii eir eit erb ere erf eri err ert etb ete etf eti etr ett fbb fbe fbf fbi fbr fbt feb fee fef fei fer fet ffe fff ffi ffr fft fib fie fif fii fir fit frb fre frf fri frr frt ftb fte ftf fti ftr ftt i-f ibb ibe ibf ibi ibr ibt ie- iee ief iei ier iet ifb ife iff ifi ifr ift iib iie iif iii iir iit ir- irb ire irf iri irr irt itb ite itf iti itt rbb rbe rbf rbi rbr rbt re- reb ree ref rei rer ret rfb rfe rff rfi rfr rft rib rie rif rii rir rit rrb rrf rri rrr rrt rtb rte rtf rti rtr rtt tbb tbe tbf tbi tbr tbt te- teb tee tef tei ter tet tfb tfe tff tfi tfr tft tib tie tif tii tir tit trb tre trf tri trr trt ttb tte ttf tti ttr ttt