-er -ic c-- ccc cce ccg cci cck ccn cco ccp ccr ce- cec cee ceg cei cek cen ceo cep cer cgc cge cgg cgi cgn cgo cgp cgr ci- cic cie cig cii cik cin cio cip cir ckc cki cko cn- cnc cne cng cni cnn cno cnp cnr co- coc coe cog coi cok con coo cop cor cpc cpe cpg cpi cpk cpn cpo cpp cpr crc cre crg cri crk crn cro crp crr ec- ecc ece ecg eci eck ecn eco ecr eec eee eeg eek een eeo eep eer egc ege egg egi egn ego egp egr eic eie eig eii eik ein eio eip eir ekc eke ekg eki eko ekp ekr en- enc ene eng eni enk enn eno enp enr eo- eoc eoe eog eoi eok eon eoo eop eor ep- epc epe epg epi epn epo epp epr erc ere erg eri erk ern ero erp err g-p gcc gce gcg gci gck gcn gco gcp gcr ge- gec gee geg gei gek gen geo gep ger ggc ggg ggi ggn ggo ggp ggr gic gie gig gii gik gin gio gip gir gkn gko gkp gnc gne gni gnn gno gnp gnr goc goe gog goi gok gon goo gop gor gpc gpe gpg gpi gpk gpn gpo gpp gpr grc gre grg gri grk grn gro grp grr icc ice icg ici ick icn ico icp icr ie- iec iee ieg iei iek ien iep ier igc ige igg igi igk ign igo igp igr iic iie iii iin iio iip iir ikc ike iki ikk iko ikr in- inc ine ing ini ink inn ino inp inr io- ioc ioe iog ioi ion ioo iop ior ipc ipe ipg ipi ipn ipo ipp ipr ir- irc ire irg iri irk irn iro irp irr kcc kce kcg kci kck kcn kcp kcr ke- kec kee keg kei kek ken keo kep ker kgc kgi kgo kgp kic kie kig kii kik kin kio kip kir kkc kke kki kkk kkn kkp kkr kn- knc kne kng kni knk knn kno knp knr koc koe kog koi kok kon koo kop kor kpc kpe kpi kpk kpn kpo kpp kpr krc krg kri krk krn kro krp krr n-i ncc nce ncg nci nck ncn nco ncp ncr ne- nec nee neg nei nek nen neo nep ner ngc nge ngg ngi ngk ngn ngo ngp nic nie nig nii nik nin nio nip nir nkc nke nki nkk nkn nko nkp nkr nnc nne nng nni nnk nnn nno nnp no- noc noe nog noi nok non noo nop nor npc npe npg npi npn npo npp npr nrc nre nrg nri nrk nrn nro nrp nrr o-i oc- occ ocg oci ock ocn oco ocp ocr oec oee oeg oei oen oeo oep oer ogc oge ogg ogi ogn ogo ogp oic oie oii oik oin oio oip oir okc oke okg oki okk oko okp okr on- onc one ong oni onk onn ono onp onr oo- ooc oog ooi ook oon ooo oop oor op- opc ope opg opi opk opn opo opp opr or- orc ore org ori ork orn oro orp orr p-p pcc pce pcg pci pck pcn pco pcp pcr pec pee peg pei pek pen peo pep per pgc pge pgg pgi pgk pgn pgo pgp pgr pic pie pig pii pik pin pio pip pir pkc pke pkg pki pkn pko pkp pkr pn- pnc pne png pni pnk pnn pno pnp pnr poc poe pog poi pok pon poo pop por ppc ppe ppg ppi ppk ppn ppo ppp ppr prc pre prg pri prk prn pro prp prr rcc rce rcg rci rcn rco rcp rcr re- rec ree reg rei rek ren reo rep rer rgc rge rgg rgi rgk rgn rgo rgp rgr ric rie rig rii rik rin rio rip rir rkc rke rkg rkk rko rkp rnc rng rni rnn rno rnp rnr roc roe rog roi rok ron roo rop ror rpc rpe rpg rpi rpk rpn rpo rpp rpr rrc rrg rri rrk rrn rrp rrr