c-- ccc ccd cck ccr ccs ccu cdc cdd cdk cdr cds cdu cdy ckc ckd cks cky crc crd crk crr crs cru cry csc csd csk csr css csu csy cuc cud cuk cur cus cuu cuy cyc cyd cyk cyr cys dcc dcd dck dcr dcs dcu ddc ddd ddk ddr dds ddu ddy dkc dkk dkr dks dku drc drd drk drr drs dru dry dsc dsd dsk dsr dss dsu dsy duc dud duk dur dus duy dy- dyc dyd dyk dyr dys dyu dyy kcc kcd kck kcr kcs kcu kdc kdk kdr kds kdu kdy kkc kkk kkr kks kku kky krc krd krk krr krs kru kry ksc ksd ksk ksr kss ksu kuc kud kuk kur kus kuu kuy kyc kyd kyr kys kyu rcc rcd rcr rcs rcu rdc rdd rdr rds rdu rdy rkc rkk rks rku rky rrc rrd rrk rrr rrs rru rsc rsd rsk rsr rss rsu ruc rud ruk rur rus ruu ruy ry- ryc ryd ryk ryr rys ryu ryy scc scd sck scr scs scu sdc sdd sdk sdr sds sdu sdy sk- skc skd skk skr sks sku sky sr- src srd srk srr srs sry ss- ssc ssd ssk ssr sss ssu suc sud suk sur sus suu suy sy- syc syd syk syr sys syu ucc ucd uck ucr ucs ucu udc udd udk udr uds udu ukc ukk ukr uku ur- urc urd urk urr urs uru ury usc usd usk usr uss usu uuc uur uus uuu uyc uys uyu ycc ycd ycs ycu ycy yds ydy ykk yrc yrs yru ysc ysk ysr yss ysu ysy yud yuk yur yus yuu yuy yyc yys yyu yyy