c-- ccc ccf ccn ccr ccu cfc cff cfn cfr cfu cn- cnc cnf cnn cnr cnu crc crf crn crr cru cuc cuf cun cur cuu fcc fcf fcn fcr fcu ffc fff ffn ffr ffu fnc fnf fnn fnr fnu frc frf frn frr fru fuf fun fur fuu ncc ncf ncn ncr ncu nfc nff nfn nfr nfu nnc nnf nnn nnu nrc nrf nrn nrr nru nuc nun nur nuu rcc rcf rcn rcr rcu rfc rff rfn rfr rfu rnc rnn rnr rnu rrc rrf rrn rrr rru ruc ruf run rur ruu ucc ucf ucn ucr ucu ufc uff ufn ufr ufu un- unc unf unn unr unu ur- urc urf urn urr uru uuc uun uur uuu