-er -ic c-- ccc cce ccg cci ccn cco ccr ccx ce- cec cee ceg cei cen ceo cer cex cgc cge cgg cgi cgn cgo cgr ci- cic cie cig cii cin cio cir cix cn- cnc cne cng cni cnn cno cnr cnx co- coc coe cog coi con coo cor cox crc cre crg cri crn cro crr crx cxc cxi cxo cxr cxx ec- ecc ece ecg eci ecn eco ecr ecx eec eee eeg een eeo eer eex egc ege egg egi egn ego egr egx eic eie eig eii ein eio eir eix en- enc ene eng eni enn eno enr eo- eoc eoe eog eoi eon eoo eor erc ere erg eri ern ero err ex- exc exe exi exo exr exx gcc gce gcg gci gcn gco gcr ge- gec gee geg gei gen geo ger gex ggc ggg ggi ggn ggo ggr gic gie gig gii gin gio gir gnc gne gni gnn gno gnr goc goe gog goi gon goo gor gox grc gre grg gri grn gro grr grx icc ice icg ici icn ico icr ie- iec iee ieg iei ien ier iex igc ige igg igi ign igo igr iic iie iii iin iio iir iix in- inc ine ing ini inn ino inr inx io- ioc ioe iog ioi ion ioo ior ir- irc ire irg iri irn iro irr irx ixc ixe ixi ixn n-i ncc nce ncg nci ncn nco ncr ncx ne- nec nee neg nei nen neo ner nex ngc nge ngg ngi ngn ngo nic nie nig nii nin nio nir nix nnc nne nng nni nnn nno no- noc noe nog noi non noo nor nox nrc nre nrg nri nrn nro nrr nrx nxc o-i oc- occ ocg oci ocn oco ocr ocx oec oee oeg oei oen oeo oer oex ogc oge ogg ogi ogn ogo ogx oic oie oii oin oio oir on- onc one ong oni onn ono onr onx oo- ooc oog ooi oon ooo oor oox or- orc ore org ori orn oro orr orx ox- oxc oxi oxn oxo oxx rcc rce rcg rci rcn rco rcr rcx re- rec ree reg rei ren reo rer rex rgc rge rgg rgi rgn rgo rgr rgx ric rie rig rii rin rio rir rix rnc rng rni rnn rno rnr roc roe rog roi ron roo ror rox rrc rrg rri rrn rrr rxr xci xcr xcx xee xeg xen xer xex xge xgi xic xie xii xin xio xix xnc xno xoc xog xoi xon xoo xor xox xrc xrx xxi xxo xxx