-ol b-p bbb bbc bbk bbl bbo bbp bbr bcb bcc bck bcl bco bcp bcr bkb bkc bkk bkl bko bkp bkr blb blc blk bll blo blp blr bob boc bok bol boo bop bor bpb bpc bpl bpo bpp bpr brb brk brl bro brp brr c-- cbb cbc cbk cbl cbo cbp cbr ccb ccc cck ccl cco ccp ccr ckb ckc cko cl- clb clc clk cll clo clp clr co- cob coc cok col coo cop cor cpb cpc cpk cpl cpo cpp cpr crb crc crk crl cro crp crr kbb kbc kbk kbl kbo kbp kbr kcb kcc kck kcl kcp kcr kkb kkc kkk kkl kkp kkr kl- klb klc klo klr kob koc kok kol koo kop kor kpc kpk kpl kpo kpp kpr krc krk krl kro krp krr l-p lbb lbc lbk lbl lbo lbp lbr lcb lcc lck lcl lco lcp lcr lkb lkl lkp lkr llb llc llk lll llo llp llr lob loc lok lol loo lop lor lpb lpc lpk lpl lpo lpp lpr lrb lrc lrk lro lrp lrr ob- obb obc obk obl obo obp obr oc- ocb occ ock ocl oco ocp ocr okb okc okk okl oko okp okr olb olc olk oll olo olp oo- oob ooc ook ool ooo oop oor op- opb opc opk opl opo opp opr or- orb orc ork orl oro orp orr p-p pbb pbc pbk pbl pbo pbp pbr pcb pcc pck pcl pco pcp pcr pkb pkc pkl pko pkp pkr plb plc plk pll plo plp plr pob poc pok pol poo pop por ppb ppc ppk ppl ppo ppp ppr prb prc prk prl pro prp prr rbb rbc rbk rbl rbo rbp rbr rcb rcc rcl rco rcp rcr rkb rkc rkk rko rkp rlc rll rlo rlp rlr rob roc rok rol roo rop ror rpb rpc rpk rpl rpo rpp rpr rrb rrc rrk rrl rrp rrr