-ol b-p bbb bbc bbd bbl bbo bbp bbs bcb bcc bcd bcl bco bcp bcs bdb bdc bdd bdl bdo bdp bds blb blc bld bll blo blp bls bob boc bod bol boo bop bos bpb bpc bpd bpl bpo bpp bps bsb bsc bsd bsl bso bsp bss c-- cbb cbc cbd cbl cbo cbp cbs ccb ccc ccd ccl cco ccp ccs cdb cdc cdd cdl cdo cdp cds cl- clb clc cld cll clo clp cls co- cob coc cod col coo cop cos cpb cpc cpd cpl cpo cpp cps csb csc csd csl cso csp css dbb dbc dbd dbl dbo dbp dbs dcb dcc dcd dcl dco dcp dcs ddb ddc ddd ddl ddo ddp dds dl- dlb dlc dld dll dlo dlp dls dob doc dod dol doo dop dos dpb dpc dpd dpl dpo dpp dps dsb dsc dsd dsl dso dsp dss l-p lbb lbc lbd lbl lbo lbp lbs lcb lcc lcd lcl lco lcp lcs ldb ldc ldd ldl ldo ldp lds llb llc lld lll llo llp lls lob loc lod lol loo lop los lpb lpc lpd lpl lpo lpp lps lsb lsc lsd lsl lso lsp lss ob- obb obc obd obl obo obp obs oc- ocb occ ocd ocl oco ocp ocs odb odc odd odl odo odp ods olb olc old oll olo olp ols oo- oob ooc ood ool ooo oop oos op- opb opc opd opl opo opp ops os- osb osc osd osl oso osp oss p-p pbb pbc pbd pbl pbo pbp pbs pcb pcc pcd pcl pco pcp pcs pdb pdc pdd pdl pdo pdp pds plb plc pld pll plo plp pls pob poc pod pol poo pop pos ppb ppc ppd ppl ppo ppp pps ps- psb psc psd psl pso psp pss sbb sbc sbd sbl sbo sbp sbs scb scc scd scl sco scp scs sdb sdc sdd sdl sdo sdp sds slb slc sld sll slo slp sls sob soc sod sol soo sop sos spb spc spd spl spo spp sps ss- ssb ssc ssd ssl sso ssp sss