-er -ic c-- ccc cce cci cck ccn cco ccr ccv ce- cec cee cei cek cen ceo cer cev ci- cic cie cii cik cin cio cir civ ckc cki cko cn- cnc cne cni cnn cno cnr cnv co- coc coe coi cok con coo cor cov crc cre cri crk crn cro crr crv cvc cve cvi cvk cvn cvo cvr cvv ec- ecc ece eci eck ecn eco ecr ecv eec eee eek een eeo eer eev eic eie eii eik ein eio eir eiv ekc eke eki eko ekr ekv en- enc ene eni enk enn eno enr env eo- eoc eoe eoi eok eon eoo eor erc ere eri erk ern ero err erv evc eve evi evn evo evr evv i-v icc ice ici ick icn ico icr icv ie- iec iee iei iek ien ier iev iic iie iii iin iio iir ikc ike iki ikk iko ikr ikv in- inc ine ini ink inn ino inr inv io- ioc ioe ioi ion ioo ior iov ir- irc ire iri irk irn iro irr irv ivc ive ivi ivo ivr ivv kcc kce kci kck kcn kcr ke- kec kee kei kek ken keo ker kev kic kie kii kik kin kio kir kiv kkc kke kki kkk kkn kkr kkv kn- knc kne kni knk knn kno knr koc koe koi kok kon koo kor krc kri krk krn kro krr krv kvi kvk kvn kvo kvr kvv n-i ncc nce nci nck ncn nco ncr ncv ne- nec nee nei nek nen neo ner nev nic nie nii nik nin nio nir niv nkc nke nki nkk nkn nko nkr nnc nne nni nnk nnn nno nnv no- noc noe noi nok non noo nor nov nrc nre nri nrk nrn nro nrr nrv nvc nve nvi nvk nvn nvv o-i oc- occ oci ock ocn oco ocr ocv oec oee oei oen oeo oer oic oie oii oik oin oio oir oiv okc oke oki okk oko okr on- onc one oni onk onn ono onr oo- ooc ooi ook oon ooo oor oov or- orc ore ori ork orn oro orr orv ov- ovc ove ovi ovo ovv rcc rce rci rcn rco rcr rcv re- rec ree rei rek ren reo rer rev ric rie rii rik rin rio rir riv rkc rke rkk rko rkv rnc rni rnn rno rnr rnv roc roe roi rok ron roo ror rov rrc rri rrk rrn rrr rvc rve rvi rvn rvo rvr rvv v-e vcc vce vci vcn vco vcr vec vee vei vek ven veo ver vi- vic vie vii vik vin vio vir viv vn- vni vno vnr vnv voc voe voi vok von voo vor vov vrc vre vri vrk vrn vrr vvc vvi vvo vvr vvv