-er -ic c-- ccc cce cci cco ccr ccs cct ccu ccx ce- cec cee cei ceo cer ces cet ceu cex ci- cic cie cii cio cir cis cit ciu cix co- coc coe coi coo cor cos cot cou cox crc cre cri cro crr crs crt cru crx csc cse csi cso csr css cst csu csx ctc cte cti cto ctr cts ctt ctu ctx cuc cue cui cuo cur cus cut cuu cxc cxi cxo cxr cxs cxt cxx ec- ecc ece eci eco ecr ecs ect ecu ecx eec eee eeo eer ees eet eex eic eie eii eio eir eis eit eiu eix eo- eoc eoe eoi eoo eor eos eot eou erc ere eri ero err ers ert eru es- esc ese esi eso esr ess est esu esx etc ete eti eto etr ets ett etu etx eu- euc eue eui eur eus eut eux ex- exc exe exi exo exr exs ext exu exx icc ice ici ico icr ics ict icu ie- iec iee iei ier ies iet iex iic iie iii iio iir iis iit iiu iix io- ioc ioe ioi ioo ior ios iot iou ir- irc ire iri iro irr irs irt iru irx is- isc ise isi iso isr iss ist isu itc ite iti ito its itt itu itx iu- iuc iue iui iur ius iut ixc ixe ixi o-i oc- occ oci oco ocr ocs oct ocu ocx oec oee oei oeo oer oes oet oex oic oie oii oio oir ois oit oiu oo- ooc ooi ooo oor oos oot oox or- orc ore ori oro orr ors ort oru orx os- osc ose osi oso osr oss ost osu osx ot- otc ote oti oto otr ots ott otu ou- ouc oue oui ouo our ous out ox- oxc oxi oxo oxt oxx rcc rce rci rco rcr rcs rct rcu rcx re- rec ree rei reo rer res ret reu rex ric rie rii rio rir ris rit rix roc roe roi roo ror ros rot rou rox rrc rri rrr rrs rrt rru rsc rse rsi rso rsr rss rst rsu rsx rtc rte rti rto rtr rts rtt rtu rtx ruc rue rui ruo rur rus rut ruu rux rxr rxs scc sce sci sco scr scs sct scu scx se- sec see sei seo ser ses set seu sex sic sie sii sio sir sis sit siu six soc soe soi soo sor sos sot sou sox sr- src sre sri sro srr srs srt srx ss- ssc sse ssi sso ssr sss sst ssu ssx stc ste sti sto str sts stt stu stx suc sue sui suo sur sus sut suu sux sxc sxi sxs sxt sxu t-x tcc tce tci tco tcr tcs tct tcu tcx te- tec tee tei teo ter tes tet teu tex tic tie tii tio tir tis tit tiu tix to- toc toe toi too tor tos tot tou tox trc tre tri tro trr trs trt tru trx tsc tse tsi tso tsr tss tst tsu tsx ttc tte tti tto ttr tts ttt ttu ttx tuc tue tui tuo tur tus tut tuu tux txe txi txs txt txu ucc uce uci uco ucr ucs uct ucu uec uee uei uer ues uet uic uie uii uio uir uis uit uiu uoc uoe uoo uor uos uot uox ur- urc ure uri uro urr urs urt uru urx usc use usi uso usr uss ust usu usx utc ute uti uto utr uts utt utu utx uuc uue uur uus uut uuu uxc uxo uxr uxt uxu xci xcr xcx xee xer xes xet xeu xex xic xie xii xio xis xit xiu xix xoc xoi xoo xor xos xot xox xrc xrt xrx xsc xsi xss xst xtc xti xtr xts xtx xue xui xus xxi xxo xxx