-ic c-- ccc ccd cci ccr ccs cct ccx cdc cdd cdi cdr cds cdt cdx ci- cic cid cii cir cis cit cix crc crd cri crr crs crt crx csc csd csi csr css cst csx ctc ctd cti ctr cts ctt ctx cxc cxi cxr cxs cxt cxx dcc dcd dci dcr dcs dct dcx ddc ddd ddi ddr dds ddt ddx di- dic did dii dir dis dit dix drc drd dri drr drs drt drx dsc dsd dsi dsr dss dst dsx dtc dtd dti dtr dts dtt dtx dxc dxd dxi dxr dxs dxt dxx i-d icc icd ici icr ics ict idc idd idi idr ids idt idx iic iid iii iir iis iit iix ir- irc ird iri irr irs irt irx is- isc isd isi isr iss ist itc itd iti its itt itx ixc ixi rcc rcd rci rcr rcs rct rcx rdc rdd rdi rdr rds rdt rdx ric rid rii rir ris rit rix rrc rrd rri rrr rrs rrt rsc rsd rsi rsr rss rst rsx rtc rtd rti rtr rts rtt rtx rxr rxs scc scd sci scr scs sct scx sdc sdd sdi sdr sds sdt sic sid sii sir sis sit six sr- src srd sri srr srs srt srx ss- ssc ssd ssi ssr sss sst ssx stc std sti str sts stt stx sxc sxi sxs sxt t-x tcc tcd tci tcr tcs tct tcx tdc tdd tdi tdr tds tdt tdx tic tid tii tir tis tit tix trc trd tri trr trs trt trx tsc tsd tsi tsr tss tst tsx ttc ttd tti ttr tts ttt ttx txi txs txt xcd xci xcr xcx xdc xdi xdr xds xdt xic xii xis xit xix xrc xrd xrt xrx xsc xsi xss xst xtc xti xtr xts xtx xxi xxx