-er -ol c-- ccc ccd cce ccl cco ccr ccs cct cdc cdd cde cdl cdo cdr cds cdt ce- cec ced cee cel ceo cer ces cet cl- clc cld cle cll clo clr cls clt co- coc cod coe col coo cor cos cot crc crd cre crl cro crr crs crt csc csd cse csl cso csr css cst ctc ctd cte ctl cto ctr cts ctt dcc dcd dce dcl dco dcr dcs dct ddc ddd dde ddl ddo ddr dds ddt de- dec ded dee del deo der des det dl- dlc dld dle dll dlo dlr dls dlt doc dod doe dol doo dor dos dot drc drd dre drl dro drr drs drt dsc dsd dse dsl dso dsr dss dst dtc dtd dte dtl dto dtr dts dtt ec- ecc ecd ece ecl eco ecr ecs ect ed- edc edd ede edl edo edr eds edt eec eed eee eel eeo eer ees eet elc eld ele ell elo elr els elt eo- eoc eod eoe eol eoo eor eos eot erc erd ere erl ero err ers ert es- esc esd ese esl eso esr ess est etc etd ete etl eto etr ets ett lcc lcd lce lcl lco lcr lcs lct ldc ldd lde ldl ldo ldr lds ldt lec led lee lel leo ler les let llc lld lle lll llo llr lls llt loc lod loe lol loo lor los lot lrc lrd lro lrr lrs lrt lsc lsd lse lsl lso lsr lss lst ltc ltd lte ltl lto ltr lts ltt oc- occ ocd ocl oco ocr ocs oct odc odd ode odl odo odr ods odt oec oed oee oel oeo oer oes oet olc old ole oll olo ols olt oo- ooc ood ool ooo oor oos oot or- orc ord ore orl oro orr ors ort os- osc osd ose osl oso osr oss ost ot- otc otd ote otl oto otr ots ott rcc rcd rce rcl rco rcr rcs rct rdc rdd rde rdl rdo rdr rds rdt re- rec red ree rel reo rer res ret rlc rld rle rll rlo rlr rls rlt roc rod roe rol roo ror ros rot rrc rrd rrl rrr rrs rrt rsc rsd rse rsl rso rsr rss rst rtc rtd rte rtl rto rtr rts rtt scc scd sce scl sco scr scs sct sdc sdd sde sdl sdo sdr sds sdt se- sec sed see sel seo ser ses set slc sld sle sll slo slr sls slt soc sod soe sol soo sor sos sot sr- src srd sre srl sro srr srs srt ss- ssc ssd sse ssl sso ssr sss sst stc std ste stl sto str sts stt tcc tcd tce tcl tco tcr tcs tct tdc tdd tde tdl tdo tdr tds tdt te- tec ted tee tel teo ter tes tet tlc tld tle tll tlo tlr tls tlt to- toc tod toe tol too tor tos tot trc trd tre trl tro trr trs trt tsc tsd tse tsl tso tsr tss tst ttc ttd tte ttl tto ttr tts ttt