-ol bbb bbe bbf bbi bbl bbo bbx be- beb bee bef bei bel beo bex bfb bfe bff bfi bfl bfo bfx bi- bib bie bif bii bil bio bix blb ble blf bli bll blo blx bob boe bof boi bol boo box bxb bxi bxl bxo bxx ebb ebe ebf ebi ebl ebo ebx eeb eee eef eel eeo eex ef- efb efe eff efi efl efo efx eib eie eif eii eil eio eix elb ele elf eli ell elo elx eo- eob eoe eof eoi eol eoo ex- exe exi exl exo exx fbb fbe fbf fbi fbl fbo fbx feb fee fef fei fel feo fex ffe fff ffi ffl ffo ffx fib fie fif fii fil fix flb fle flf fli fll flo flx fob foe fof foi fol foo fox fxe fxi fxx i-f ibb ibe ibf ibi ibl ibo ibx ie- iee ief iei iel iex ifb ife iff ifi ifl ifo ifx iib iie iif iii iil iio iix il- ilb ile ilf ili ill ilo ilx io- iob ioe iof ioi iol ioo ixe ixi ixl lbb lbe lbf lbi lbl lbo lbx leb lee lef lei lel leo lex lfb lfe lff lfi lfl lfo lfx lib lie lif lii lil lio lix llb lle llf lli lll llo lob loe lof loi lol loo lox lxi lxo lxx o-i ob- obb obe obf obi obl obo obx oeb oee oef oei oel oeo oex of- ofb ofe off ofi ofl ofo ofx oib oie oif oii oil oio olb ole olf oli oll olo oo- oob oof ooi ool ooo oox ox- oxb oxf oxi oxo oxx xbe xbl xbx xee xel xex xfe xfl xfx xie xii xio xix xlb xlf xli xof xoi xoo xox xxi xxl xxo xxx