bbb bbe bbf bbi bbo be- beb bee bef bei beo bfb bfe bff bfi bfo bi- bib bie bif bii bio bob boe bof boi boo ebb ebe ebf ebi ebo eeb eee eef eeo ef- efb efe eff efi efo eib eie eif eii eio eo- eob eoe eof eoi eoo fbb fbe fbf fbi fbo feb fee fef fei feo ffe fff ffi ffo fib fie fif fii fob foe fof foi foo i-f ibb ibe ibf ibi ibo ie- iee ief iei ifb ife iff ifi ifo iib iie iif iii iio io- iob ioe iof ioi ioo o-i ob- obb obe obf obi obo oeb oee oef oei oeo of- ofb ofe off ofi ofo oib oie oif oii oio oo- oob oof ooi ooo