-er -ic c-- ccc ccd cce cch cci cck ccn ccr cdc cdd cde cdh cdi cdk cdn cdr ce- cec ced cee ceh cei cek cen cer ch- chc chd che chh chi chk chn chr ci- cic cid cie cih cii cik cin cir ckc ckd ckh cki cn- cnc cnd cne cnh cni cnn cnr crc crd cre crh cri crk crn crr dcc dcd dce dci dck dcn dcr ddc ddd dde ddh ddi ddk ddn ddr de- dec ded dee deh dei dek den der dh- dhc dhd dhe dhh dhi dhk dhr di- dic did die dih dii dik din dir dkc dke dki dkk dkr dnc dnd dne dnh dni dnk dnn dnr drc drd dre dri drk drn drr ec- ecc ecd ece ech eci eck ecn ecr ed- edc edd ede edh edi edk edn edr eec eed eee eek een eer ehc ehd ehe ehh ehi ehn ehr eic eid eie eii eik ein eir ekc ekd eke ekh eki ekr en- enc end ene enh eni enk enn enr erc erd ere erh eri erk ern err h-i hcc hcd hce hch hci hck hcn hcr hdc hdd hde hdh hdi hdk hdn hdr he- hec hed hee heh hei hek hen her hhc hhd hhe hhh hhi hhk hhn hhr hic hid hie hih hii hik hin hir hkd hkh hki hkk hkn hkr hnc hnd hne hnh hnk hnn hr- hrc hrd hre hrh hri hrk hrn hrr i-d icc icd ice ich ici ick icn icr idc idd ide idh idi idk idn idr ie- iec ied iee iei iek ien ier ihc ihd ihe ihh ihi ihk ihn ihr iic iid iie iih iii iin iir ikc ike iki ikk ikr in- inc ind ine inh ini ink inn inr ir- irc ird ire iri irk irn irr kcc kcd kce kch kci kck kcn kcr kdc kde kdh kdk kdr ke- kec ked kee keh kei kek ken ker khe khh khi khk khn khr kic kid kie kih kii kik kin kir kkc kke kkh kki kkk kkn kkr kn- knc knd kne kni knk knn knr krc krd kri krk krn krr n-i ncc ncd nce nch nci nck ncn ncr ndc ndd nde ndh ndi ndk ndn ndr ne- nec ned nee neh nei nek nen ner nhc nhd nhe nhh nhi nhk nhn nhr nic nid nie nih nii nik nin nir nkc nke nki nkk nkn nkr nnc nne nnh nni nnk nnn nrc nrd nre nri nrk nrn nrr rcc rcd rce rch rci rcn rcr rdc rdd rde rdh rdi rdn rdr re- rec red ree reh rei rek ren rer rh- rhc rhd rhe rhh rhi rhn rhr ric rid rie rih rii rik rin rir rkc rke rkk rnc rnd rnh rni rnn rnr rrc rrd rrh rri rrk rrn rrr