c-- ccc ccf ccn ccs ccu cfc cff cfn cfs cfu cn- cnc cnf cnn cns cnu csc csf csn css csu cuc cuf cun cus cuu fcc fcf fcn fcs fcu ffc fff ffn ffs ffu fnc fnf fnn fns fnu fsc fsf fsn fss fsu fuf fun fus fuu ncc ncf ncn ncs ncu nfc nff nfn nfs nfu nnc nnf nnn nns nnu nsc nsf nsn nss nsu nuc nun nus nuu scc scf scn scs scu sfc sff sfn sfs sfu snc snf snn sns snu ss- ssc ssf ssn sss ssu suc suf sun sus suu ucc ucf ucn ucs ucu ufc uff ufn ufs ufu un- unc unf unn uns unu usc usf usn uss usu uuc uun uus uuu