a-a aaa aad aae aaf aah aak ad- ada add ade adf adh adk aea aed aee aef aeh aek af- afa afd afe aff afh afk aha ahd ahe ahf ahh ahk aka akd ake akh akk daa dad dae daf dah dak dda ddd dde ddf ddh ddk de- dea ded dee def deh dek dfa dfd dfe dff dfh dfk dh- dha dhd dhe dhf dhh dhk dka dke dkk eaa ead eae eaf eah eak ed- eda edd ede edf edh edk eea eed eee eef eek ef- efa efd efe eff efh eha ehd ehe ehf ehh eka ekd eke ekf ekh faa fad fae faf fah fak fda fdd fde fdf fdh fdk fea fed fee fef feh fek ffa ffd ffe fff ffh ffk fha fhe fhf fhh fka fkf fkk haa had hae haf hah hak hda hdd hde hdf hdh hdk he- hea hed hee hef heh hek hfa hfd hfe hff hfh hfk hha hhd hhe hhf hhh hhk hka hkd hkf hkh hkk ka- kaa kad kae kaf kah kak kda kde kdf kdh kdk ke- kea ked kee kef keh kek kfa kfd kff kfh kha khe khf khh khk kke kkh kkk