-er -ol c-- ccc ccd cce ccl cco ccr ccs cct ccu cdc cdd cde cdl cdo cdr cds cdt cdu ce- cec ced cee cel ceo cer ces cet ceu cl- clc cld cle cll clo clr cls clt clu co- coc cod coe col coo cor cos cot cou crc crd cre crl cro crr crs crt cru csc csd cse csl cso csr css cst csu ctc ctd cte ctl cto ctr cts ctt ctu cuc cud cue cul cuo cur cus cut cuu dcc dcd dce dcl dco dcr dcs dct dcu ddc ddd dde ddl ddo ddr dds ddt ddu de- dec ded dee del deo der des det deu dl- dlc dld dle dll dlo dlr dls dlt dlu doc dod doe dol doo dor dos dot dou drc drd dre drl dro drr drs drt dru dsc dsd dse dsl dso dsr dss dst dsu dtc dtd dte dtl dto dtr dts dtt dtu duc dud due dul duo dur dus dut ec- ecc ecd ece ecl eco ecr ecs ect ecu ed- edc edd ede edl edo edr eds edt edu eec eed eee eel eeo eer ees eet elc eld ele ell elo elr els elt elu eo- eoc eod eoe eol eoo eor eos eot eou erc erd ere erl ero err ers ert eru es- esc esd ese esl eso esr ess est esu etc etd ete etl eto etr ets ett etu eu- euc eud eue eul eur eus eut lcc lcd lce lcl lco lcr lcs lct lcu ldc ldd lde ldl ldo ldr lds ldt ldu lec led lee lel leo ler les let leu llc lld lle lll llo llr lls llt llu loc lod loe lol loo lor los lot lou lrc lrd lro lrr lrs lrt lru lsc lsd lse lsl lso lsr lss lst lsu ltc ltd lte ltl lto ltr lts ltt ltu luc lud lue lul luo lur lus lut luu oc- occ ocd ocl oco ocr ocs oct ocu odc odd ode odl odo odr ods odt odu oec oed oee oel oeo oer oes oet olc old ole oll olo ols olt olu oo- ooc ood ool ooo oor oos oot or- orc ord ore orl oro orr ors ort oru os- osc osd ose osl oso osr oss ost osu ot- otc otd ote otl oto otr ots ott otu ou- ouc oud oue oul ouo our ous out rcc rcd rce rcl rco rcr rcs rct rcu rdc rdd rde rdl rdo rdr rds rdt rdu re- rec red ree rel reo rer res ret reu rlc rld rle rll rlo rlr rls rlt rlu roc rod roe rol roo ror ros rot rou rrc rrd rrl rrr rrs rrt rru rsc rsd rse rsl rso rsr rss rst rsu rtc rtd rte rtl rto rtr rts rtt rtu ruc rud rue ruo rur rus rut ruu scc scd sce scl sco scr scs sct scu sdc sdd sde sdl sdo sdr sds sdt sdu se- sec sed see sel seo ser ses set seu slc sld sle sll slo slr sls slt slu soc sod soe sol soo sor sos sot sou sr- src srd sre srl sro srr srs srt ss- ssc ssd sse ssl sso ssr sss sst ssu stc std ste stl sto str sts stt stu suc sud sue sul suo sur sus sut suu tcc tcd tce tcl tco tcr tcs tct tcu tdc tdd tde tdl tdo tdr tds tdt tdu te- tec ted tee tel teo ter tes tet teu tlc tld tle tll tlo tlr tls tlt tlu to- toc tod toe tol too tor tos tot tou trc trd tre trl tro trr trs trt tru tsc tsd tse tsl tso tsr tss tst tsu ttc ttd tte ttl tto ttr tts ttt ttu tuc tud tue tul tuo tur tus tut tuu ucc ucd uce ucl uco ucr ucs uct ucu udc udd ude udl udo udr uds udt udu uec ued uee uel uer ues uet ulc uld ule ull ulo ulr uls ult ulu uoc uod uoe uol uoo uor uos uot ur- urc urd ure url uro urr urs urt uru usc usd use usl uso usr uss ust usu utc utd ute utl uto utr uts utt utu uuc uue uur uus uut uuu