-er c-- ccc cce ccf cco ccr cct ccu ce- cec cee cef ceo cer cet ceu cfc cfe cff cfo cfr cft cfu co- coc coe cof coo cor cot cou crc cre crf cro crr crt cru ctc cte ctf cto ctr ctt ctu cuc cue cuf cuo cur cut cuu ec- ecc ece ecf eco ecr ect ecu eec eee eef eeo eer eet ef- efc efe eff efo efr eft eo- eoc eoe eof eoo eor eot eou erc ere erf ero err ert eru etc ete etf eto etr ett etu eu- euc eue euf eur eut fcc fce fcf fco fcr fct fcu fec fee fef feo fer fet feu ffc ffe fff ffo ffr fft ffu foc foe fof foo for fot fou frc fre frf fro frr frt fru ftc fte ftf fto ftr ftt ftu fue fuf fuo fur fut fuu oc- occ ocf oco ocr oct ocu oec oee oef oeo oer oet of- ofc ofe off ofo ofr oft ofu oo- ooc oof ooo oor oot or- orc ore orf oro orr ort oru ot- otc ote otf oto otr ott otu ou- ouc oue ouf ouo our out rcc rce rcf rco rcr rct rcu re- rec ree ref reo rer ret reu rfc rfe rff rfo rfr rft rfu roc roe rof roo ror rot rou rrc rrf rrr rrt rru rtc rte rtf rto rtr rtt rtu ruc rue ruf ruo rur rut ruu tcc tce tcf tco tcr tct tcu te- tec tee tef teo ter tet teu tfc tfe tff tfo tfr tft tfu to- toc toe tof too tor tot tou trc tre trf tro trr trt tru ttc tte ttf tto ttr ttt ttu tuc tue tuf tuo tur tut tuu ucc uce ucf uco ucr uct ucu uec uee uef uer uet ufc ufe uff ufo ufr uft ufu uoc uoe uoo uor uot ur- urc ure urf uro urr urt uru utc ute utf uto utr utt utu uuc uue uur uut uuu