c-- ccc ccf cck ccn cco ccr ccu cfc cff cfk cfn cfo cfr cfu ckc cko cn- cnc cnf cnn cno cnr cnu co- coc cof cok con coo cor cou crc crf crk crn cro crr cru cuc cuf cuk cun cuo cur cuu fcc fcf fck fcn fco fcr fcu ffc fff ffk ffn ffo ffr ffu fkc fkf fkk fnc fnf fnk fnn fnr fnu foc fof fok fon foo for fou frc frf frk frn fro frr fru fuf fuk fun fuo fur fuu kcc kck kcn kcr kcu kfc kff kfo kfu kkc kkk kkn kkr kku kn- knc knf knk knn kno knr knu koc kof kok kon koo kor kou krc krf krk krn kro krr kru kuc kuk kun kur kuu ncc ncf nck ncn nco ncr ncu nfc nff nfk nfn nfo nfr nfu nkc nkf nkk nkn nko nkr nku nnc nnf nnk nnn nno nnu no- noc nof nok non noo nor nou nrc nrf nrk nrn nro nrr nru nuc nuk nun nuo nur nuu oc- occ ocf ock ocn oco ocr ocu of- ofc off ofn ofo ofr ofu okc okk oko okr oku on- onc onf onk onn ono onr onu oo- ooc oof ook oon ooo oor or- orc orf ork orn oro orr oru ou- ouc ouf ouk oun ouo our rcc rcf rcn rco rcr rcu rfc rff rfk rfn rfo rfr rfu rkc rkf rkk rko rku rnc rnn rno rnr rnu roc rof rok ron roo ror rou rrc rrf rrk rrn rrr rru ruc ruf ruk run ruo rur ruu ucc ucf uck ucn uco ucr ucu ufc uff ufn ufo ufr ufu ukc ukf ukk ukn ukr uku un- unc unf unk unn uno unr unu uoc uok uon uoo uor ur- urc urf urk urn uro urr uru uuc uun uur uuu