a-a a-c aaa aac aae aah aak ac- aca acc ace ach ack aea aec aee aeh aek aha ahc ahe ahh ahk aka akc ake akh akk c-- caa cac cae cah cak cca ccc cce cch cck ce- cea cec cee ceh cek ch- cha chc che chh chk cka ckc ckh eaa eac eae eah eak ec- eca ecc ece ech eck eea eec eee eek eha ehc ehe ehh eka ekc eke ekh haa hac hae hah hak hca hcc hce hch hck he- hea hec hee heh hek hha hhc hhe hhh hhk hka hkh hkk ka- kaa kac kae kah kak kca kcc kce kch kck ke- kea kec kee keh kek kha khe khh khk kkc kke kkh kkk