c-- ccc ccd cce cch cck cdc cdd cde cdh cdk ce- cec ced cee ceh cek ch- chc chd che chh chk ckc ckd ckh dcc dcd dce dck ddc ddd dde ddh ddk de- dec ded dee deh dek dh- dhc dhd dhe dhh dhk dkc dke dkk ec- ecc ecd ece ech eck ed- edc edd ede edh edk eec eed eee eek ehc ehd ehe ehh ekc ekd eke ekh hcc hcd hce hch hck hdc hdd hde hdh hdk he- hec hed hee heh hek hhc hhd hhe hhh hhk hkd hkh hkk kcc kcd kce kch kck kdc kde kdh kdk ke- kec ked kee keh kek khe khh khk kkc kke kkh kkk