c-- ccc ccd cce ccn cco ccs cct cdc cdd cde cdn cdo cds cdt ce- cec ced cee cen ceo ces cet cn- cnc cnd cne cnn cno cns cnt co- coc cod coe con coo cos cot csc csd cse csn cso css cst ctc ctd cte ctn cto cts ctt dcc dcd dce dcn dco dcs dct ddc ddd dde ddn ddo dds ddt de- dec ded dee den deo des det dnc dnd dne dnn dno dns dnt doc dod doe don doo dos dot dsc dsd dse dsn dso dss dst dtc dtd dte dtn dto dts dtt ec- ecc ecd ece ecn eco ecs ect ed- edc edd ede edn edo eds edt eec eed eee een eeo ees eet en- enc end ene enn eno ens ent eo- eoc eod eoe eon eoo eos eot es- esc esd ese esn eso ess est etc etd ete etn eto ets ett ncc ncd nce ncn nco ncs nct ndc ndd nde ndn ndo nds ndt ne- nec ned nee nen neo nes net nnc nne nnn nno nns nnt no- noc nod noe non noo nos not nsc nsd nse nsn nso nss nst ntc ntd nte ntn nto nts ntt oc- occ ocd ocn oco ocs oct odc odd ode odn odo ods odt oec oed oee oen oeo oes oet on- onc ond one onn ono ons ont oo- ooc ood oon ooo oos oot os- osc osd ose osn oso oss ost ot- otc otd ote otn oto ots ott scc scd sce scn sco scs sct sdc sdd sde sdn sdo sds sdt se- sec sed see sen seo ses set snc snd sne snn sno sns snt soc sod soe son soo sos sot ss- ssc ssd sse ssn sso sss sst stc std ste stn sto sts stt tcc tcd tce tcn tco tcs tct tdc tdd tde tdn tdo tds tdt te- tec ted tee ten teo tes tet tnc tnd tne tnn tno tns tnt to- toc tod toe ton too tos tot tsc tsd tse tsn tso tss tst ttc ttd tte ttn tto tts ttt