c-- ccc ccf ccr ccs ccu cfc cff cfr cfs cfu crc crf crr crs cru cry csc csf csr css csu csy cuc cuf cur cus cuu cuy cyc cyf cyr cys fcc fcf fcr fcs fcu fcy ffc fff ffr ffs ffu ffy frc frf frr frs fru fry fsc fsf fsr fss fsu fuf fur fus fuu fy- fyc rcc rcf rcr rcs rcu rfc rff rfr rfs rfu rrc rrf rrr rrs rru rsc rsf rsr rss rsu ruc ruf rur rus ruu ruy ry- ryc ryf ryr rys ryu ryy scc scf scr scs scu sfc sff sfr sfs sfu sr- src srf srr srs sry ss- ssc ssf ssr sss ssu suc suf sur sus suu suy sy- syc syr sys syu ucc ucf ucr ucs ucu ufc uff ufr ufs ufu ur- urc urf urr urs uru ury usc usf usr uss usu uuc uur uus uuu uyc uys uyu ycc ycf ycs ycu ycy yfc yff yfr yfs yfu yrc yrf yrs yru ysc ysr yss ysu ysy yur yus yuu yuy yyc yyf yys yyu yyy