-er -ic c-- ccc cce cch cci ccr ccx ce- cec cee ceh cei cer cex ch- chc che chh chi chr chx ci- cic cie cih cii cir cix crc cre crh cri crr crx cxc cxh cxi cxr cxx ec- ecc ece ech eci ecr ecx eec eee eer eex ehc ehe ehh ehi ehr eic eie eii eir eix erc ere erh eri err ex- exc exe exh exi exr exx h-i hcc hce hch hci hcr he- hec hee heh hei her hex hhc hhe hhh hhi hhr hic hie hih hii hir hix hr- hrc hre hrh hri hrr hxc icc ice ich ici icr ie- iec iee iei ier iex ihc ihe ihh ihi ihr iic iie iih iii iir iix ir- irc ire iri irr irx ixc ixe ixi rcc rce rch rci rcr rcx re- rec ree reh rei rer rex rh- rhc rhe rhh rhi rhr ric rie rih rii rir rix rrc rrh rri rrr rxr xch xci xcr xcx xee xer xex xic xie xii xix xrc xrx xxi xxx