-ic c-- ccc ccd ccg cci ccx cdc cdd cdg cdi cdx cgc cgd cgg cgi ci- cic cid cig cii cix cxc cxi cxx dcc dcd dcg dci dcx ddc ddd ddg ddi ddx dgc dgd dgg dgi di- dic did dig dii dix dxc dxd dxi dxx g-d gcc gcd gcg gci gdc gdd gdi gdx ggc ggd ggg ggi gic gid gig gii i-d icc icd icg ici idc idd idg idi idx igc igd igg igi iic iid iii iix ixc ixi xcd xci xcx xdc xdi xgi xic xii xix xxi xxx