-er -ic c-- ccc cce cci ccn ccr cct ccx ce- cec cee cei cen cer cet cex ci- cic cie cii cin cir cit cix cn- cnc cne cni cnn cnr cnt cnx crc cre cri crn crr crt crx ctc cte cti ctn ctr ctt ctx cxc cxi cxr cxt cxx ec- ecc ece eci ecn ecr ect ecx eec eee een eer eet eex eic eie eii ein eir eit eix en- enc ene eni enn enr ent erc ere eri ern err ert etc ete eti etn etr ett etx ex- exc exe exi exr ext exx icc ice ici icn icr ict ie- iec iee iei ien ier iet iex iic iie iii iin iir iit iix in- inc ine ini inn inr int inx ir- irc ire iri irn irr irt irx itc ite iti itn itt itx ixc ixe ixi ixn n-i ncc nce nci ncn ncr nct ncx ne- nec nee nei nen ner net nex nic nie nii nin nir nit nix nnc nne nni nnn nnt nrc nre nri nrn nrr nrt nrx ntc nte nti ntn ntr ntt ntx nxc nxt rcc rce rci rcn rcr rct rcx re- rec ree rei ren rer ret rex ric rie rii rin rir rit rix rnc rni rnn rnr rnt rrc rri rrn rrr rrt rtc rte rti rtn rtr rtt rtx rxr t-x tcc tce tci tcn tcr tct tcx te- tec tee tei ten ter tet tex tic tie tii tin tir tit tix tnc tne tni tnn tnr tnt tnx trc tre tri trn trr trt trx ttc tte tti ttn ttr ttt ttx txe txi txn txt xci xcr xcx xee xen xer xet xex xic xie xii xin xit xix xnc xrc xrt xrx xtc xti xtr xtx xxi xxx