-ic c-- ccc ccd cci ccr ccs ccu cdc cdd cdi cdr cds cdu ci- cic cid cii cir cis ciu crc crd cri crr crs cru csc csd csi csr css csu cuc cud cui cur cus cuu dcc dcd dci dcr dcs dcu ddc ddd ddi ddr dds ddu di- dic did dii dir dis diu drc drd dri drr drs dru dsc dsd dsi dsr dss dsu duc dud dui dur dus i-d icc icd ici icr ics icu idc idd idi idr ids idu iic iid iii iir iis iiu ir- irc ird iri irr irs iru is- isc isd isi isr iss isu iu- iuc iud iui iur ius rcc rcd rci rcr rcs rcu rdc rdd rdi rdr rds rdu ric rid rii rir ris rrc rrd rri rrr rrs rru rsc rsd rsi rsr rss rsu ruc rud rui rur rus ruu scc scd sci scr scs scu sdc sdd sdi sdr sds sdu sic sid sii sir sis siu sr- src srd sri srr srs ss- ssc ssd ssi ssr sss ssu suc sud sui sur sus suu ucc ucd uci ucr ucs ucu udc udd udi udr uds udu uic uid uii uir uis uiu ur- urc urd uri urr urs uru usc usd usi usr uss usu uuc uur uus uuu