-ic c-- ccc ccd cci cco ccr ccs ccx cdc cdd cdi cdo cdr cds cdx ci- cic cid cii cio cir cis cix co- coc cod coi coo cor cos cox crc crd cri cro crr crs crx csc csd csi cso csr css csx cxc cxi cxo cxr cxs cxx dcc dcd dci dco dcr dcs dcx ddc ddd ddi ddo ddr dds ddx di- dic did dii dio dir dis dix doc dod doi doo dor dos dox drc drd dri dro drr drs drx dsc dsd dsi dso dsr dss dsx dxc dxd dxi dxo dxr dxs dxx i-d icc icd ici ico icr ics idc idd idi ido idr ids idx iic iid iii iio iir iis iix io- ioc iod ioi ioo ior ios ir- irc ird iri iro irr irs irx is- isc isd isi iso isr iss ixc ixi o-i oc- occ ocd oci oco ocr ocs ocx odc odd odi odo odr ods oic oid oii oio oir ois oo- ooc ood ooi ooo oor oos oox or- orc ord ori oro orr ors orx os- osc osd osi oso osr oss osx ox- oxc oxi oxo oxx rcc rcd rci rco rcr rcs rcx rdc rdd rdi rdo rdr rds rdx ric rid rii rio rir ris rix roc rod roi roo ror ros rox rrc rrd rri rrr rrs rsc rsd rsi rso rsr rss rsx rxr rxs scc scd sci sco scr scs scx sdc sdd sdi sdo sdr sds sic sid sii sio sir sis six soc sod soi soo sor sos sox sr- src srd sri sro srr srs srx ss- ssc ssd ssi sso ssr sss ssx sxc sxi sxs xcd xci xcr xcx xdc xdi xdr xds xic xii xio xis xix xoc xod xoi xoo xor xos xox xrc xrd xrx xsc xsi xss xxi xxo xxx