-ic -ol c-- ccc ccd cci cck ccl cco ccr ccs cdc cdd cdi cdk cdl cdo cdr cds ci- cic cid cii cik cil cio cir cis ckc ckd cki cko cks cl- clc cld cli clk cll clo clr cls co- coc cod coi cok col coo cor cos crc crd cri crk crl cro crr crs csc csd csi csk csl cso csr css dcc dcd dci dck dcl dco dcr dcs ddc ddd ddi ddk ddl ddo ddr dds di- dic did dii dik dil dio dir dis dkc dki dkk dkl dko dkr dks dl- dlc dld dli dlk dll dlo dlr dls doc dod doi dok dol doo dor dos drc drd dri drk drl dro drr drs dsc dsd dsi dsk dsl dso dsr dss i-d icc icd ici ick icl ico icr ics idc idd idi idk idl ido idr ids iic iid iii iil iio iir iis ikc iki ikk ikl iko ikr iks il- ilc ild ili ilk ill ilo ilr ils io- ioc iod ioi iol ioo ior ios ir- irc ird iri irk irl iro irr irs is- isc isd isi isk isl iso isr iss kcc kcd kci kck kcl kcr kcs kdc kdk kdl kdo kdr kds kic kid kii kik kil kio kir kis kkc kki kkk kkl kkr kks kl- klc kld kli klo klr kls koc kod koi kok kol koo kor kos krc krd kri krk krl kro krr krs ksc ksd ksi ksk ksl kso ksr kss lcc lcd lci lck lcl lco lcr lcs ldc ldd ldi ldk ldl ldo ldr lds lic lid lii lik lil lio lir lis lkl lkr lks llc lld lli llk lll llo llr lls loc lod loi lok lol loo lor los lrc lrd lri lrk lro lrr lrs lsc lsd lsi lsk lsl lso lsr lss o-i oc- occ ocd oci ock ocl oco ocr ocs odc odd odi odl odo odr ods oic oid oii oik oil oio oir ois okc okd oki okk okl oko okr oks olc old oli olk oll olo ols oo- ooc ood ooi ook ool ooo oor oos or- orc ord ori ork orl oro orr ors os- osc osd osi osk osl oso osr oss rcc rcd rci rcl rco rcr rcs rdc rdd rdi rdl rdo rdr rds ric rid rii rik ril rio rir ris rkc rkk rko rks rlc rld rli rll rlo rlr rls roc rod roi rok rol roo ror ros rrc rrd rri rrk rrl rrr rrs rsc rsd rsi rsk rsl rso rsr rss scc scd sci sck scl sco scr scs sdc sdd sdi sdk sdl sdo sdr sds sic sid sii sik sil sio sir sis sk- skc skd ski skk skl sko skr sks slc sld sli slk sll slo slr sls soc sod soi sok sol soo sor sos sr- src srd sri srk srl sro srr srs ss- ssc ssd ssi ssk ssl sso ssr sss