-er -ic c-- ccc cce ccg cci cck ccn cco ccr ce- cec cee ceg cei cek cen ceo cer cgc cge cgg cgi cgn cgo cgr ci- cic cie cig cii cik cin cio cir ckc cki cko cn- cnc cne cng cni cnn cno cnr co- coc coe cog coi cok con coo cor crc cre crg cri crk crn cro crr ec- ecc ece ecg eci eck ecn eco ecr eec eee eeg eek een eeo eer egc ege egg egi egn ego egr eic eie eig eii eik ein eio eir ekc eke ekg eki eko ekr en- enc ene eng eni enk enn eno enr eo- eoc eoe eog eoi eok eon eoo eor erc ere erg eri erk ern ero err gcc gce gcg gci gck gcn gco gcr ge- gec gee geg gei gek gen geo ger ggc ggg ggi ggn ggo ggr gic gie gig gii gik gin gio gir gkn gko gnc gne gni gnn gno gnr goc goe gog goi gok gon goo gor grc gre grg gri grk grn gro grr icc ice icg ici ick icn ico icr ie- iec iee ieg iei iek ien ier igc ige igg igi igk ign igo igr iic iie iii iin iio iir ikc ike iki ikk iko ikr in- inc ine ing ini ink inn ino inr io- ioc ioe iog ioi ion ioo ior ir- irc ire irg iri irk irn iro irr kcc kce kcg kci kck kcn kcr ke- kec kee keg kei kek ken keo ker kgc kgi kgo kic kie kig kii kik kin kio kir kkc kke kki kkk kkn kkr kn- knc kne kng kni knk knn kno knr koc koe kog koi kok kon koo kor krc krg kri krk krn kro krr n-i ncc nce ncg nci nck ncn nco ncr ne- nec nee neg nei nek nen neo ner ngc nge ngg ngi ngk ngn ngo nic nie nig nii nik nin nio nir nkc nke nki nkk nkn nko nkr nnc nne nng nni nnk nnn nno no- noc noe nog noi nok non noo nor nrc nre nrg nri nrk nrn nro nrr o-i oc- occ ocg oci ock ocn oco ocr oec oee oeg oei oen oeo oer ogc oge ogg ogi ogn ogo oic oie oii oik oin oio oir okc oke okg oki okk oko okr on- onc one ong oni onk onn ono onr oo- ooc oog ooi ook oon ooo oor or- orc ore org ori ork orn oro orr rcc rce rcg rci rcn rco rcr re- rec ree reg rei rek ren reo rer rgc rge rgg rgi rgk rgn rgo rgr ric rie rig rii rik rin rio rir rkc rke rkg rkk rko rnc rng rni rnn rno rnr roc roe rog roi rok ron roo ror rrc rrg rri rrk rrn rrr