-er c-- ccc cce cco ccr cct ccu ccx ce- cec cee ceo cer cet ceu cex co- coc coe coo cor cot cou cox crc cre cro crr crt cru crx ctc cte cto ctr ctt ctu ctx cuc cue cuo cur cut cuu cxc cxo cxr cxt cxx ec- ecc ece eco ecr ect ecu ecx eec eee eeo eer eet eex eo- eoc eoe eoo eor eot eou erc ere ero err ert eru etc ete eto etr ett etu etx eu- euc eue eur eut eux ex- exc exe exo exr ext exu exx oc- occ oco ocr oct ocu ocx oec oee oeo oer oet oex oo- ooc ooo oor oot oox or- orc ore oro orr ort oru orx ot- otc ote oto otr ott otu ou- ouc oue ouo our out ox- oxc oxo oxt oxx rcc rce rco rcr rct rcu rcx re- rec ree reo rer ret reu rex roc roe roo ror rot rou rox rrc rrr rrt rru rtc rte rto rtr rtt rtu rtx ruc rue ruo rur rut ruu rux rxr t-x tcc tce tco tcr tct tcu tcx te- tec tee teo ter tet teu tex to- toc toe too tor tot tou tox trc tre tro trr trt tru trx ttc tte tto ttr ttt ttu ttx tuc tue tuo tur tut tuu tux txe txt txu ucc uce uco ucr uct ucu uec uee uer uet uoc uoe uoo uor uot uox ur- urc ure uro urr urt uru urx utc ute uto utr utt utu utx uuc uue uur uut uuu uxc uxo uxr uxt uxu xcr xcx xee xer xet xeu xex xoc xoo xor xot xox xrc xrt xrx xtc xtr xtx xue xxo xxx