-th c-- ccc ccd cce cch cck cco cct cdc cdd cde cdh cdk cdo cdt ce- cec ced cee ceh cek ceo cet ch- chc chd che chh chk cho cht ckc ckd ckh cko ckt co- coc cod coe coh cok coo cot ctc ctd cte cth ctk cto ctt dcc dcd dce dck dco dct ddc ddd dde ddh ddk ddo ddt de- dec ded dee deh dek deo det dh- dhc dhd dhe dhh dhk dho dht dkc dke dkk dko dkt doc dod doe doh dok doo dot dtc dtd dte dth dtk dto dtt ec- ecc ecd ece ech eck eco ect ed- edc edd ede edh edk edo edt eec eed eee eek eeo eet ehc ehd ehe ehh eho eht ekc ekd eke ekh eko ekt eo- eoc eod eoe eoh eok eoo eot etc etd ete eth etk eto ett hcc hcd hce hch hck hco hct hdc hdd hde hdh hdk hdo hdt he- hec hed hee heh hek heo het hhc hhd hhe hhh hhk hho hht hkd hkh hkk hko hkt hoc hod hoe hoh hok hoo hot htc htd hte hth htk hto htt k-t kcc kcd kce kch kck kct kdc kde kdh kdk kdo kdt ke- kec ked kee keh kek keo ket khe khh khk kho kkc kke kkh kkk kkt koc kod koe koh kok koo kot ktc kte kth ktk kto ktt oc- occ ocd och ock oco oct odc odd ode odh odo odt oec oed oee oeh oeo oet ohc ohd ohe ohh oho oht okc okd oke okk oko oo- ooc ood ooh ook ooo oot ot- otc otd ote oth otk oto ott tcc tcd tce tch tck tco tct tdc tdd tde tdh tdk tdo tdt te- tec ted tee teh tek teo tet th- thc thd the thh thk tho tht tkc tke tkk tko tkt to- toc tod toe toh tok too tot ttc ttd tte tth ttk tto ttt