bbb bbe bbf bbi bbo bbt be- beb bee bef bei beo bet bfb bfe bff bfi bfo bft bi- bib bie bif bii bio bit bob boe bof boi boo bot btb bte btf bti bto btt ebb ebe ebf ebi ebo ebt eeb eee eef eeo eet ef- efb efe eff efi efo eft eib eie eif eii eio eit eo- eob eoe eof eoi eoo eot etb ete etf eti eto ett fbb fbe fbf fbi fbo fbt feb fee fef fei feo fet ffe fff ffi ffo fft fib fie fif fii fit fob foe fof foi foo fot ftb fte ftf fti fto ftt i-f ibb ibe ibf ibi ibo ibt ie- iee ief iei iet ifb ife iff ifi ifo ift iib iie iif iii iio iit io- iob ioe iof ioi ioo iot itb ite itf iti ito itt o-i ob- obb obe obf obi obo obt oeb oee oef oei oeo oet of- ofb ofe off ofi ofo oft oib oie oif oii oio oit oo- oob oof ooi ooo oot ot- otb ote otf oti oto ott tbb tbe tbf tbi tbo tbt te- teb tee tef tei teo tet tfb tfe tff tfi tfo tft tib tie tif tii tio tit to- tob toe tof toi too tot ttb tte ttf tti tto ttt