-ic c-- ccc ccd cce cci cco ccs ccx cdc cdd cde cdi cdo cds cdx ce- cec ced cee cei ceo ces cex ci- cic cid cie cii cio cis cix co- coc cod coe coi coo cos cox csc csd cse csi cso css csx cxc cxi cxo cxs cxx dcc dcd dce dci dco dcs dcx ddc ddd dde ddi ddo dds ddx de- dec ded dee dei deo des dex di- dic did die dii dio dis dix doc dod doe doi doo dos dox dsc dsd dse dsi dso dss dsx dxc dxd dxi dxo dxs dxx ec- ecc ecd ece eci eco ecs ecx ed- edc edd ede edi edo eds edx eec eed eee eeo ees eex eic eid eie eii eio eis eix eo- eoc eod eoe eoi eoo eos es- esc esd ese esi eso ess esx ex- exc exd exe exi exo exs exx i-d icc icd ice ici ico ics idc idd ide idi ido ids idx ie- iec ied iee iei ies iex iic iid iie iii iio iis iix io- ioc iod ioe ioi ioo ios is- isc isd ise isi iso iss ixc ixe ixi o-i oc- occ ocd oci oco ocs ocx odc odd ode odi odo ods oec oed oee oei oeo oes oex oic oid oie oii oio ois oo- ooc ood ooi ooo oos oox os- osc osd ose osi oso oss osx ox- oxc oxi oxo oxx scc scd sce sci sco scs scx sdc sdd sde sdi sdo sds se- sec sed see sei seo ses sex sic sid sie sii sio sis six soc sod soe soi soo sos sox ss- ssc ssd sse ssi sso sss ssx sxc sxi sxs xcd xci xcx xdc xde xdi xds xed xee xes xex xic xie xii xio xis xix xoc xod xoi xoo xos xox xsc xsi xss xxi xxo xxx