-ic -ol bbb bbc bbd bbf bbi bbk bbl bbo bbr bbs bcb bcc bcd bcf bci bck bcl bco bcr bcs bdb bdc bdd bdf bdi bdk bdl bdo bdr bds bfb bfc bfd bff bfi bfl bfo bfr bfs bi- bib bic bid bif bii bik bil bio bir bis bkb bkc bkf bkk bkl bko bkr bks blb blc bld blf bli blk bll blo blr bls bob boc bod bof boi bok bol boo bor bos brb brd brf bri brk brl bro brr brs bsb bsc bsd bsf bsi bsk bsl bso bsr bss c-- cbb cbc cbd cbf cbi cbk cbl cbo cbr cbs ccb ccc ccd ccf cci cck ccl cco ccr ccs cdb cdc cdd cdf cdi cdk cdl cdo cdr cds cfb cfc cfd cff cfi cfk cfl cfo cfr cfs ci- cib cic cid cif cii cik cil cio cir cis ckb ckc ckd cki cko cks cl- clb clc cld clf cli clk cll clo clr cls co- cob coc cod cof coi cok col coo cor cos crb crc crd crf cri crk crl cro crr crs csb csc csd csf csi csk csl cso csr css dbb dbc dbd dbf dbi dbk dbl dbo dbr dbs dcb dcc dcd dcf dci dck dcl dco dcr dcs ddb ddc ddd ddf ddi ddk ddl ddo ddr dds dfb dfc dfd dff dfi dfk dfl dfo dfr dfs di- dib dic did dif dii dik dil dio dir dis dkb dkc dki dkk dkl dko dkr dks dl- dlb dlc dld dlf dli dlk dll dlo dlr dls dob doc dod dof doi dok dol doo dor dos drb drc drd dri drk drl dro drr drs dsb dsc dsd dsf dsi dsk dsl dso dsr dss fbb fbc fbd fbf fbi fbk fbl fbo fbr fbs fcb fcc fcd fcf fci fck fcl fco fcr fcs fdb fdc fdd fdf fdi fdk fdl fdo fdr fds ffc ffd fff ffi ffk ffl ffo ffr ffs fib fic fid fif fii fik fil fir fis fkb fkc fkf fki fkk fkl flb flc fld flf fli fll flo flr fls fob foc fof foi fok fol foo for fos frb frc frd frf fri frk frl fro frr frs fsb fsc fsd fsf fsi fsk fsl fso fsr fss i-d i-f ibb ibc ibd ibf ibi ibk ibl ibo ibr ibs icb icc icd icf ici ick icl ico icr ics idb idc idd idf idi idk idl ido idr ids ifb ifc ifd iff ifi ifl ifo ifr ifs iib iic iid iif iii iil iio iir iis ikb ikc ikf iki ikk ikl iko ikr iks il- ilb ilc ild ilf ili ilk ill ilo ilr ils io- iob ioc iod iof ioi iol ioo ior ios ir- irb irc ird irf iri irk irl iro irr irs is- isb isc isd isf isi isk isl iso isr iss kbb kbc kbd kbf kbi kbk kbl kbo kbr kbs kcb kcc kcd kci kck kcl kcr kcs kdb kdc kdf kdk kdl kdo kdr kds kfc kfd kff kfi kfo kfs kib kic kid kif kii kik kil kio kir kis kkb kkc kki kkk kkl kkr kks kl- klb klc kld klf kli klo klr kls kob koc kod kof koi kok kol koo kor kos krc krd krf kri krk krl kro krr krs ksb ksc ksd ksf ksi ksk ksl kso ksr kss lbb lbc lbd lbf lbi lbk lbl lbo lbr lbs lcb lcc lcd lcf lci lck lcl lco lcr lcs ldb ldc ldd ldf ldi ldk ldl ldo ldr lds lfb lfc lfd lff lfi lfk lfl lfo lfr lfs lib lic lid lif lii lik lil lio lir lis lkb lkl lkr lks llb llc lld llf lli llk lll llo llr lls lob loc lod lof loi lok lol loo lor los lrb lrc lrd lrf lri lrk lro lrr lrs lsb lsc lsd lsf lsi lsk lsl lso lsr lss o-i ob- obb obc obd obf obi obk obl obo obr obs oc- ocb occ ocd ocf oci ock ocl oco ocr ocs odb odc odd odf odi odl odo odr ods of- ofb ofc ofd off ofi ofl ofo ofr ofs oib oic oid oif oii oik oil oio oir ois okb okc okd oki okk okl oko okr oks olb olc old olf oli olk oll olo ols oo- oob ooc ood oof ooi ook ool ooo oor oos or- orb orc ord orf ori ork orl oro orr ors os- osb osc osd osf osi osk osl oso osr oss rbb rbc rbd rbf rbi rbk rbl rbo rbr rbs rcb rcc rcd rcf rci rcl rco rcr rcs rdb rdc rdd rdf rdi rdl rdo rdr rds rfb rfc rfd rff rfi rfk rfl rfo rfr rfs rib ric rid rif rii rik ril rio rir ris rkb rkc rkf rkk rko rks rlc rld rlf rli rll rlo rlr rls rob roc rod rof roi rok rol roo ror ros rrb rrc rrd rrf rri rrk rrl rrr rrs rsb rsc rsd rsf rsi rsk rsl rso rsr rss sbb sbc sbd sbf sbi sbk sbl sbo sbr sbs scb scc scd scf sci sck scl sco scr scs sdb sdc sdd sdf sdi sdk sdl sdo sdr sds sfb sfc sfd sff sfi sfk sfl sfo sfr sfs sib sic sid sif sii sik sil sio sir sis sk- skb skc skd skf ski skk skl sko skr sks slb slc sld slf sli slk sll slo slr sls sob soc sod sof soi sok sol soo sor sos sr- srb src srd srf sri srk srl sro srr srs ss- ssb ssc ssd ssf ssi ssk ssl sso ssr sss