-er -ic a-a a-c a-i aaa aac aae aah aai aao aap aar aax ac- aca acc ace ach aci aco acp acr acx aea aec aee aeh aei aeo aep aer aex aha ahc ahe ahh ahi aho ahp ahr ahx ai- aia aic aie aih aii aio aip air aix aoa aoc aoe aoh aoi aoo aop aor aox ap- apa apc ape aph api apo app apr apx ar- ara arc are arh ari aro arp arr arx ax- axa axe axh axi axo axp axr axx c-- caa cac cae cah cai cao cap car cax cca ccc cce cch cci cco ccp ccr ccx ce- cea cec cee ceh cei ceo cep cer cex ch- cha chc che chh chi cho chp chr chx ci- cia cic cie cih cii cio cip cir cix co- coa coc coe coh coi coo cop cor cox cpa cpc cpe cph cpi cpo cpp cpr cpx cra crc cre crh cri cro crp crr crx cxc cxh cxi cxo cxp cxr cxx eaa eac eae eah eai eao eap ear eax ec- eca ecc ece ech eci eco ecr ecx eea eec eee eeo eep eer eex eha ehc ehe ehh ehi eho ehp ehr eia eic eie eii eio eip eir eix eo- eoa eoc eoe eoh eoi eoo eop eor ep- epa epc epe eph epi epo epp epr epx era erc ere erh eri ero erp err ex- exa exc exe exh exi exo exp exr exx h-i haa hac hae hah hai hao hap har hax hca hcc hce hch hci hco hcp hcr he- hea hec hee heh hei heo hep her hex hha hhc hhe hhh hhi hho hhp hhr hia hic hie hih hii hio hip hir hix hoa hoc hoe hoh hoi hoo hop hor hox hpa hpc hpe hph hpi hpo hpp hpr hr- hra hrc hre hrh hri hro hrp hrr hxc ia- iaa iac iae iah iai iao iap iar ica icc ice ich ici ico icp icr ie- iea iec iee iei iep ier iex iha ihc ihe ihh ihi iho ihp ihr iia iic iie iih iii iio iip iir iix io- ioa ioc ioe ioh ioi ioo iop ior ipa ipc ipe ipi ipo ipp ipr ipx ir- ira irc ire iri iro irp irr irx ixc ixe ixi o-i oaa oac oae oah oai oao oap oar oax oc- oca occ och oci oco ocp ocr ocx oea oec oee oeh oei oeo oep oer oex oha ohc ohe ohh ohi oho ohp ohr oia oic oie oii oio oip oir oo- ooa ooc ooh ooi ooo oop oor oox op- opa opc ope oph opi opo opp opr opx or- ora orc ore orh ori oro orp orr orx ox- oxa oxc oxi oxo oxx p-p paa pac pae pah pai pao pap par pax pca pcc pce pch pci pco pcp pcr pcx pea pec pee peh pei peo pep per pex pha phc phe phi pho php phr phx pia pic pie pih pii pio pip pir pix poa poc poe poh poi poo pop por pox ppa ppc ppe pph ppi ppo ppp ppr ppx pra prc pre prh pri pro prp prr prx pxc pxe pxr ra- raa rac rae rah rai rao rap rar rax rca rcc rce rch rci rco rcp rcr rcx re- rea rec ree reh rei reo rep rer rex rh- rha rhc rhe rhh rhi rho rhp rhr ria ric rie rih rii rio rip rir rix roa roc roe roh roi roo rop ror rox rpa rpc rpe rph rpi rpo rpp rpr rpx rra rrc rrh rri rrp rrr rxp rxr xaa xac xap xar xch xci xcp xcr xcx xee xep xer xex xhp xia xic xie xii xio xix xoa xoc xoi xoo xop xor xox xpa xpc xpe xpo xpp xrc xrx xxi xxo xxp xxx