c-- ccc ccd cce cch cck ccl cdc cdd cde cdh cdk cdl ce- cec ced cee ceh cek cel ch- chc chd che chh chk chl ckc ckd ckh cl- clc cld cle clh clk cll dcc dcd dce dck dcl ddc ddd dde ddh ddk ddl de- dec ded dee deh dek del dh- dhc dhd dhe dhh dhk dhl dkc dke dkk dkl dl- dlc dld dle dlh dlk dll ec- ecc ecd ece ech eck ecl ed- edc edd ede edh edk edl eec eed eee eek eel ehc ehd ehe ehh ehl ekc ekd eke ekh ekl elc eld ele elh elk ell hcc hcd hce hch hck hcl hdc hdd hde hdh hdk hdl he- hec hed hee heh hek hel hhc hhd hhe hhh hhk hhl hkd hkh hkk hkl hlc hld hle hlh hll kcc kcd kce kch kck kcl kdc kde kdh kdk kdl ke- kec ked kee keh kek kel khe khh khk kkc kke kkh kkk kkl kl- klc kld klh lcc lcd lce lch lck lcl ldc ldd lde ldh ldk ldl lec led lee leh lek lel lhc lhd lhh lhk lkh lkl llc lld lle llk lll