-ol b-p bbb bbe bbi bbl bbo bbp bbx be- beb bee bei bel beo bep bex bi- bib bie bii bil bio bip bix blb ble bli bll blo blp blx bob boe boi bol boo bop box bpb bpe bpi bpl bpo bpp bpx bxb bxi bxl bxo bxx ebb ebe ebi ebl ebo ebp ebx eeb eee eel eeo eep eex eib eie eii eil eio eip eix elb ele eli ell elo elp elx eo- eob eoe eoi eol eoo eop ep- epb epe epi epl epo epp epx ex- exe exi exl exo exp exx ibb ibe ibi ibl ibo ibp ibx ie- iee iei iel iep iex iib iie iii iil iio iip iix il- ilb ile ili ill ilo ilp ilx io- iob ioe ioi iol ioo iop ipb ipe ipi ipl ipo ipp ipx ixe ixi ixl l-p lbb lbe lbi lbl lbo lbp lbx leb lee lei lel leo lep lex lib lie lii lil lio lip lix llb lle lli lll llo llp lob loe loi lol loo lop lox lpb lpe lpi lpl lpo lpp lpx lxi lxo lxx o-i ob- obb obe obi obl obo obp obx oeb oee oei oel oeo oep oex oib oie oii oil oio oip olb ole oli oll olo olp oo- oob ooi ool ooo oop oox op- opb ope opi opl opo opp opx ox- oxb oxi oxo oxx p-p pbb pbe pbi pbl pbo pbp pbx peb pee pei pel peo pep pex pib pie pii pil pio pip pix plb ple pli pll plo plp plx pob poe poi pol poo pop pox ppb ppe ppi ppl ppo ppp ppx pxe pxl xbe xbl xbx xee xel xep xex xie xii xio xix xlb xli xoi xoo xop xox xpb xpe xpl xpo xpp xxi xxl xxo xxp xxx