-ol b-p bbb bbe bbi bbl bbo bbp be- beb bee bei bel beo bep bi- bib bie bii bil bio bip blb ble bli bll blo blp bob boe boi bol boo bop bpb bpe bpi bpl bpo bpp ebb ebe ebi ebl ebo ebp eeb eee eel eeo eep eib eie eii eil eio eip elb ele eli ell elo elp eo- eob eoe eoi eol eoo eop ep- epb epe epi epl epo epp ibb ibe ibi ibl ibo ibp ie- iee iei iel iep iib iie iii iil iio iip il- ilb ile ili ill ilo ilp io- iob ioe ioi iol ioo iop ipb ipe ipi ipl ipo ipp l-p lbb lbe lbi lbl lbo lbp leb lee lei lel leo lep lib lie lii lil lio lip llb lle lli lll llo llp lob loe loi lol loo lop lpb lpe lpi lpl lpo lpp o-i ob- obb obe obi obl obo obp oeb oee oei oel oeo oep oib oie oii oil oio oip olb ole oli oll olo olp oo- oob ooi ool ooo oop op- opb ope opi opl opo opp p-p pbb pbe pbi pbl pbo pbp peb pee pei pel peo pep pib pie pii pil pio pip plb ple pli pll plo plp pob poe poi pol poo pop ppb ppe ppi ppl ppo ppp