-ic c-- ccc ccd cci ccr ccs cct cdc cdd cdi cdr cds cdt ci- cic cid cii cir cis cit crc crd cri crr crs crt csc csd csi csr css cst ctc ctd cti ctr cts ctt dcc dcd dci dcr dcs dct ddc ddd ddi ddr dds ddt di- dic did dii dir dis dit drc drd dri drr drs drt dsc dsd dsi dsr dss dst dtc dtd dti dtr dts dtt i-d icc icd ici icr ics ict idc idd idi idr ids idt iic iid iii iir iis iit ir- irc ird iri irr irs irt is- isc isd isi isr iss ist itc itd iti its itt rcc rcd rci rcr rcs rct rdc rdd rdi rdr rds rdt ric rid rii rir ris rit rrc rrd rri rrr rrs rrt rsc rsd rsi rsr rss rst rtc rtd rti rtr rts rtt scc scd sci scr scs sct sdc sdd sdi sdr sds sdt sic sid sii sir sis sit sr- src srd sri srr srs srt ss- ssc ssd ssi ssr sss sst stc std sti str sts stt tcc tcd tci tcr tcs tct tdc tdd tdi tdr tds tdt tic tid tii tir tis tit trc trd tri trr trs trt tsc tsd tsi tsr tss tst ttc ttd tti ttr tts ttt