-er -ic c-- ccc cce ccg cci cco ccr ccu ccx ce- cec cee ceg cei ceo cer ceu cex cgc cge cgg cgi cgo cgr cgu ci- cic cie cig cii cio cir ciu cix co- coc coe cog coi coo cor cou cox crc cre crg cri cro crr cru crx cuc cue cug cui cuo cur cuu cxc cxi cxo cxr cxx ec- ecc ece ecg eci eco ecr ecu ecx eec eee eeg eeo eer eex egc ege egg egi ego egr egu egx eic eie eig eii eio eir eiu eix eo- eoc eoe eog eoi eoo eor eou erc ere erg eri ero err eru eu- euc eue eug eui eur eux ex- exc exe exi exo exr exu exx gcc gce gcg gci gco gcr gcu ge- gec gee geg gei geo ger geu gex ggc ggg ggi ggo ggr ggu gic gie gig gii gio gir giu goc goe gog goi goo gor gou gox grc gre grg gri gro grr gru grx gu- guc gue gug gui guo gur guu icc ice icg ici ico icr icu ie- iec iee ieg iei ier iex igc ige igg igi igo igr igu iic iie iii iio iir iiu iix io- ioc ioe iog ioi ioo ior iou ir- irc ire irg iri iro irr iru irx iu- iuc iue iug iui iur ixc ixe ixi o-i oc- occ ocg oci oco ocr ocu ocx oec oee oeg oei oeo oer oex ogc oge ogg ogi ogo ogx oic oie oii oio oir oiu oo- ooc oog ooi ooo oor oox or- orc ore org ori oro orr oru orx ou- ouc oue oui ouo our ox- oxc oxi oxo oxx rcc rce rcg rci rco rcr rcu rcx re- rec ree reg rei reo rer reu rex rgc rge rgg rgi rgo rgr rgx ric rie rig rii rio rir rix roc roe rog roi roo ror rou rox rrc rrg rri rrr rru ruc rue rug rui ruo rur ruu rux rxr ucc uce ucg uci uco ucr ucu uec uee ueg uei uer ugc uge ugg ugi ugo ugr ugu ugx uic uie uig uii uio uir uiu uoc uoe uog uoo uor uox ur- urc ure urg uri uro urr uru urx uuc uue uug uur uuu uxc uxo uxr uxu xci xcr xcx xee xeg xer xeu xex xge xgi xic xie xii xio xiu xix xoc xog xoi xoo xor xox xrc xrx xue xui xxi xxo xxx