c-- ccc ccd ccf cck cco ccr cct ccu cdc cdd cdf cdk cdo cdr cdt cdu cfc cfd cff cfk cfo cfr cft cfu ckc ckd cko ckt co- coc cod cof cok coo cor cot cou crc crd crf crk cro crr crt cru ctc ctd ctf ctk cto ctr ctt ctu cuc cud cuf cuk cuo cur cut cuu dcc dcd dcf dck dco dcr dct dcu ddc ddd ddf ddk ddo ddr ddt ddu dfc dfd dff dfk dfo dfr dft dfu dkc dkk dko dkr dkt dku doc dod dof dok doo dor dot dou drc drd drk dro drr drt dru dtc dtd dtf dtk dto dtr dtt dtu duc dud duf duk duo dur dut fcc fcd fcf fck fco fcr fct fcu fdc fdd fdf fdk fdo fdr fdt fdu ffc ffd fff ffk ffo ffr fft ffu fkc fkf fkk fkt foc fof fok foo for fot fou frc frd frf frk fro frr frt fru ftc ftd ftf ftk fto ftr ftt ftu fud fuf fuk fuo fur fut fuu k-t kcc kcd kck kcr kct kcu kdc kdf kdk kdo kdr kdt kdu kfc kfd kff kfo kfu kkc kkk kkr kkt kku koc kod kof kok koo kor kot kou krc krd krf krk kro krr krt kru ktc ktf ktk kto ktr ktt ktu kuc kud kuk kur kut kuu oc- occ ocd ocf ock oco ocr oct ocu odc odd odf odo odr odt odu of- ofc ofd off ofo ofr oft ofu okc okd okk oko okr oku oo- ooc ood oof ook ooo oor oot or- orc ord orf ork oro orr ort oru ot- otc otd otf otk oto otr ott otu ou- ouc oud ouf ouk ouo our out rcc rcd rcf rco rcr rct rcu rdc rdd rdf rdo rdr rdt rdu rfc rfd rff rfk rfo rfr rft rfu rkc rkf rkk rko rkt rku roc rod rof rok roo ror rot rou rrc rrd rrf rrk rrr rrt rru rtc rtd rtf rtk rto rtr rtt rtu ruc rud ruf ruk ruo rur rut ruu tcc tcd tcf tck tco tcr tct tcu tdc tdd tdf tdk tdo tdr tdt tdu tfc tfd tff tfk tfo tfr tft tfu tkc tkk tko tkr tkt to- toc tod tof tok too tor tot tou trc trd trf trk tro trr trt tru ttc ttd ttf ttk tto ttr ttt ttu tuc tud tuf tuk tuo tur tut tuu ucc ucd ucf uck uco ucr uct ucu udc udd udf udk udo udr udt udu ufc ufd uff ufo ufr uft ufu ukc ukf ukk ukr uku uoc uod uok uoo uor uot ur- urc urd urf urk uro urr urt uru utc utd utf utk uto utr utt utu uuc uur uut uuu