-th c-- ccc ccd cce cch cck ccs cct cdc cdd cde cdh cdk cds cdt ce- cec ced cee ceh cek ces cet ch- chc chd che chh chk chs cht ckc ckd ckh cks ckt csc csd cse csh csk css cst ctc ctd cte cth ctk cts ctt dcc dcd dce dck dcs dct ddc ddd dde ddh ddk dds ddt de- dec ded dee deh dek des det dh- dhc dhd dhe dhh dhk dhs dht dkc dke dkk dks dkt dsc dsd dse dsh dsk dss dst dtc dtd dte dth dtk dts dtt ec- ecc ecd ece ech eck ecs ect ed- edc edd ede edh edk eds edt eec eed eee eek ees eet ehc ehd ehe ehh ehs eht ekc ekd eke ekh eks ekt es- esc esd ese esh esk ess est etc etd ete eth etk ets ett hcc hcd hce hch hck hcs hct hdc hdd hde hdh hdk hds hdt he- hec hed hee heh hek hes het hhc hhd hhe hhh hhk hhs hht hkd hkh hkk hks hkt hsc hsd hse hsh hsk hss hst htc htd hte hth htk hts htt k-t kcc kcd kce kch kck kcs kct kdc kde kdh kdk kds kdt ke- kec ked kee keh kek kes ket khe khh khk khs kkc kke kkh kkk kks kkt ksc ksd kse ksh ksk kss kst ktc kte kth ktk kts ktt scc scd sce sch sck scs sct sdc sdd sde sdh sdk sds sdt se- sec sed see seh sek ses set sh- shc shd she shh shk shs sht sk- skc skd ske skh skk sks skt ss- ssc ssd sse ssh ssk sss sst stc std ste sth stk sts stt tcc tcd tce tch tck tcs tct tdc tdd tde tdh tdk tds tdt te- tec ted tee teh tek tes tet th- thc thd the thh thk ths tht tkc tke tkk tks tkt tsc tsd tse tsh tsk tss tst ttc ttd tte tth ttk tts ttt