-er -ic c-- ccc cce cch cci cck ccn cco ccr ce- cec cee ceh cei cek cen ceo cer ch- chc che chh chi chk chn cho chr ci- cic cie cih cii cik cin cio cir ckc ckh cki cko cn- cnc cne cnh cni cnn cno cnr co- coc coe coh coi cok con coo cor crc cre crh cri crk crn cro crr ec- ecc ece ech eci eck ecn eco ecr eec eee eek een eeo eer ehc ehe ehh ehi ehn eho ehr eic eie eii eik ein eio eir ekc eke ekh eki eko ekr en- enc ene enh eni enk enn eno enr eo- eoc eoe eoh eoi eok eon eoo eor erc ere erh eri erk ern ero err h-i hcc hce hch hci hck hcn hco hcr he- hec hee heh hei hek hen heo her hhc hhe hhh hhi hhk hhn hho hhr hic hie hih hii hik hin hio hir hkh hki hkk hkn hko hkr hnc hne hnh hnk hnn hno hoc hoe hoh hoi hok hon hoo hor hr- hrc hre hrh hri hrk hrn hro hrr icc ice ich ici ick icn ico icr ie- iec iee iei iek ien ier ihc ihe ihh ihi ihk ihn iho ihr iic iie iih iii iin iio iir ikc ike iki ikk iko ikr in- inc ine inh ini ink inn ino inr io- ioc ioe ioh ioi ion ioo ior ir- irc ire iri irk irn iro irr kcc kce kch kci kck kcn kcr ke- kec kee keh kei kek ken keo ker khe khh khi khk khn kho khr kic kie kih kii kik kin kio kir kkc kke kkh kki kkk kkn kkr kn- knc kne kni knk knn kno knr koc koe koh koi kok kon koo kor krc kri krk krn kro krr n-i ncc nce nch nci nck ncn nco ncr ne- nec nee neh nei nek nen neo ner nhc nhe nhh nhi nhk nhn nhr nic nie nih nii nik nin nio nir nkc nke nki nkk nkn nko nkr nnc nne nnh nni nnk nnn nno no- noc noe noh noi nok non noo nor nrc nre nri nrk nrn nro nrr o-i oc- occ och oci ock ocn oco ocr oec oee oeh oei oen oeo oer ohc ohe ohh ohi ohn oho ohr oic oie oii oik oin oio oir okc oke oki okk oko okr on- onc one onh oni onk onn ono onr oo- ooc ooh ooi ook oon ooo oor or- orc ore orh ori ork orn oro orr rcc rce rch rci rcn rco rcr re- rec ree reh rei rek ren reo rer rh- rhc rhe rhh rhi rhn rho rhr ric rie rih rii rik rin rio rir rkc rke rkk rko rnc rnh rni rnn rno rnr roc roe roh roi rok ron roo ror rrc rrh rri rrk rrn rrr