-er -ic a-a a-c a-i aaa aac aae aah aai aar aax ac- aca acc ace ach aci acr acx aea aec aee aeh aei aer aex aha ahc ahe ahh ahi ahr ahx ai- aia aic aie aih aii air aix ar- ara arc are arh ari arr arx ax- axa axe axh axi axr axx c-- caa cac cae cah cai car cax cca ccc cce cch cci ccr ccx ce- cea cec cee ceh cei cer cex ch- cha chc che chh chi chr chx ci- cia cic cie cih cii cir cix cra crc cre crh cri crr crx cxc cxh cxi cxr cxx eaa eac eae eah eai ear eax ec- eca ecc ece ech eci ecr ecx eea eec eee eer eex eha ehc ehe ehh ehi ehr eia eic eie eii eir eix era erc ere erh eri err ex- exa exc exe exh exi exr exx h-i haa hac hae hah hai har hax hca hcc hce hch hci hcr he- hea hec hee heh hei her hex hha hhc hhe hhh hhi hhr hia hic hie hih hii hir hix hr- hra hrc hre hrh hri hrr hxc ia- iaa iac iae iah iai iar ica icc ice ich ici icr ie- iea iec iee iei ier iex iha ihc ihe ihh ihi ihr iia iic iie iih iii iir iix ir- ira irc ire iri irr irx ixc ixe ixi ra- raa rac rae rah rai rar rax rca rcc rce rch rci rcr rcx re- rea rec ree reh rei rer rex rh- rha rhc rhe rhh rhi rhr ria ric rie rih rii rir rix rra rrc rrh rri rrr rxr xaa xac xar xch xci xcr xcx xee xer xex xia xic xie xii xix xrc xrx xxi xxx