-er -ic c-- ccc cce ccf cci cck ccn cco ccr ce- cec cee cef cei cek cen ceo cer cfc cfe cff cfi cfk cfn cfo cfr ci- cic cie cif cii cik cin cio cir ckc cki cko cn- cnc cne cnf cni cnn cno cnr co- coc coe cof coi cok con coo cor crc cre crf cri crk crn cro crr ec- ecc ece ecf eci eck ecn eco ecr eec eee eef eek een eeo eer ef- efc efe eff efi efo efr eic eie eif eii eik ein eio eir ekc eke ekf eki eko ekr en- enc ene enf eni enk enn eno enr eo- eoc eoe eof eoi eok eon eoo eor erc ere erf eri erk ern ero err fcc fce fcf fci fck fcn fco fcr fec fee fef fei fek fen feo fer ffc ffe fff ffi ffk ffn ffo ffr fic fie fif fii fik fin fir fkc fkf fki fkk fnc fne fnf fni fnk fnn fnr foc foe fof foi fok fon foo for frc fre frf fri frk frn fro frr i-f icc ice icf ici ick icn ico icr ie- iec iee ief iei iek ien ier ifc ife iff ifi ifn ifo ifr iic iie iif iii iin iio iir ikc ike ikf iki ikk iko ikr in- inc ine inf ini ink inn ino inr io- ioc ioe iof ioi ion ioo ior ir- irc ire irf iri irk irn iro irr kcc kce kci kck kcn kcr ke- kec kee kef kei kek ken keo ker kfc kff kfi kfo kic kie kif kii kik kin kio kir kkc kke kki kkk kkn kkr kn- knc kne knf kni knk knn kno knr koc koe kof koi kok kon koo kor krc krf kri krk krn kro krr n-i ncc nce ncf nci nck ncn nco ncr ne- nec nee nef nei nek nen neo ner nfc nfe nff nfi nfk nfn nfo nfr nic nie nif nii nik nin nio nir nkc nke nkf nki nkk nkn nko nkr nnc nne nnf nni nnk nnn nno no- noc noe nof noi nok non noo nor nrc nre nrf nri nrk nrn nro nrr o-i oc- occ ocf oci ock ocn oco ocr oec oee oef oei oen oeo oer of- ofc ofe off ofi ofn ofo ofr oic oie oif oii oik oin oio oir okc oke oki okk oko okr on- onc one onf oni onk onn ono onr oo- ooc oof ooi ook oon ooo oor or- orc ore orf ori ork orn oro orr rcc rce rcf rci rcn rco rcr re- rec ree ref rei rek ren reo rer rfc rfe rff rfi rfk rfn rfo rfr ric rie rif rii rik rin rio rir rkc rke rkf rkk rko rnc rni rnn rno rnr roc roe rof roi rok ron roo ror rrc rrf rri rrk rrn rrr