-ic c-- ccc ccd cci cck cco ccr cct cdc cdd cdi cdk cdo cdr cdt ci- cic cid cii cik cio cir cit ckc ckd cki cko ckt co- coc cod coi cok coo cor cot crc crd cri crk cro crr crt ctc ctd cti ctk cto ctr ctt dcc dcd dci dck dco dcr dct ddc ddd ddi ddk ddo ddr ddt di- dic did dii dik dio dir dit dkc dki dkk dko dkr dkt doc dod doi dok doo dor dot drc drd dri drk dro drr drt dtc dtd dti dtk dto dtr dtt i-d icc icd ici ick ico icr ict idc idd idi idk ido idr idt iic iid iii iio iir iit ikc iki ikk iko ikr ikt io- ioc iod ioi ioo ior iot ir- irc ird iri irk iro irr irt itc itd iti itk ito itt k-t kcc kcd kci kck kcr kct kdc kdk kdo kdr kdt kic kid kii kik kio kir kit kkc kki kkk kkr kkt koc kod koi kok koo kor kot krc krd kri krk kro krr krt ktc ktk kto ktr ktt o-i oc- occ ocd oci ock oco ocr oct odc odd odi odo odr odt oic oid oii oik oio oir oit okc okd oki okk oko okr oo- ooc ood ooi ook ooo oor oot or- orc ord ori ork oro orr ort ot- otc otd oti otk oto otr ott rcc rcd rci rco rcr rct rdc rdd rdi rdo rdr rdt ric rid rii rik rio rir rit rkc rkk rko rkt roc rod roi rok roo ror rot rrc rrd rri rrk rrr rrt rtc rtd rti rtk rto rtr rtt tcc tcd tci tck tco tcr tct tdc tdd tdi tdk tdo tdr tdt tic tid tii tik tio tir tit tkc tkk tko tkr tkt to- toc tod toi tok too tor tot trc trd tri trk tro trr trt ttc ttd tti ttk tto ttr ttt