-ic c-- ccc ccd cci cck cco ccp ccr cdc cdd cdi cdk cdo cdp cdr ci- cic cid cii cik cio cip cir ckc ckd cki cko co- coc cod coi cok coo cop cor cpc cpd cpi cpk cpo cpp cpr crc crd cri crk cro crp crr dcc dcd dci dck dco dcp dcr ddc ddd ddi ddk ddo ddp ddr di- dic did dii dik dio dip dir dkc dki dkk dko dkp dkr doc dod doi dok doo dop dor dpc dpd dpi dpk dpo dpp dpr drc drd dri drk dro drp drr i-d icc icd ici ick ico icp icr idc idd idi idk ido idp idr iic iid iii iio iip iir ikc iki ikk iko ikr io- ioc iod ioi ioo iop ior ipc ipd ipi ipo ipp ipr ir- irc ird iri irk iro irp irr kcc kcd kci kck kcp kcr kdc kdk kdo kdp kdr kic kid kii kik kio kip kir kkc kki kkk kkp kkr koc kod koi kok koo kop kor kpc kpd kpi kpk kpo kpp kpr krc krd kri krk kro krp krr o-i oc- occ ocd oci ock oco ocp ocr odc odd odi odo odp odr oic oid oii oik oio oip oir okc okd oki okk oko okp okr oo- ooc ood ooi ook ooo oop oor op- opc opd opi opk opo opp opr or- orc ord ori ork oro orp orr p-p pcc pcd pci pck pco pcp pcr pdc pdd pdi pdk pdo pdp pdr pic pid pii pik pio pip pir pkc pkd pki pko pkp pkr poc pod poi pok poo pop por ppc ppd ppi ppk ppo ppp ppr prc prd pri prk pro prp prr rcc rcd rci rco rcp rcr rdc rdd rdi rdo rdp rdr ric rid rii rik rio rip rir rkc rkk rko rkp roc rod roi rok roo rop ror rpc rpd rpi rpk rpo rpp rpr rrc rrd rri rrk rrp rrr