-er -ic c-- ccc cce cci cco ccr ccu ccx ce- cec cee cei ceo cer ceu cex ci- cic cie cii cio cir ciu cix co- coc coe coi coo cor cou cox crc cre cri cro crr cru crx cuc cue cui cuo cur cuu cxc cxi cxo cxr cxx ec- ecc ece eci eco ecr ecu ecx eec eee eeo eer eex eic eie eii eio eir eiu eix eo- eoc eoe eoi eoo eor eou erc ere eri ero err eru eu- euc eue eui eur eux ex- exc exe exi exo exr exu exx icc ice ici ico icr icu ie- iec iee iei ier iex iic iie iii iio iir iiu iix io- ioc ioe ioi ioo ior iou ir- irc ire iri iro irr iru irx iu- iuc iue iui iur ixc ixe ixi o-i oc- occ oci oco ocr ocu ocx oec oee oei oeo oer oex oic oie oii oio oir oiu oo- ooc ooi ooo oor oox or- orc ore ori oro orr oru orx ou- ouc oue oui ouo our ox- oxc oxi oxo oxx rcc rce rci rco rcr rcu rcx re- rec ree rei reo rer reu rex ric rie rii rio rir rix roc roe roi roo ror rou rox rrc rri rrr rru ruc rue rui ruo rur ruu rux rxr ucc uce uci uco ucr ucu uec uee uei uer uic uie uii uio uir uiu uoc uoe uoo uor uox ur- urc ure uri uro urr uru urx uuc uue uur uuu uxc uxo uxr uxu xci xcr xcx xee xer xeu xex xic xie xii xio xiu xix xoc xoi xoo xor xox xrc xrx xue xui xxi xxo xxx