-ey a-a a-b a-i aaa aab aae aah aai aak aay ab- aba abb abe abh abi abk aby aea aeb aee aeh aei aek aey aha ahb ahe ahh ahi ahk ahy ai- aia aib aie aih aii aik aiy aka akb ake akh aki akk ay- aya aye ayh ayi ayk baa bab bae bah bai bak bay bba bbb bbe bbh bbi bbk bby be- bea beb bee beh bei bek bey bha bhb bhe bhh bhi bhk bi- bia bib bie bih bii bik biy bka bkb bke bkk by- bya bye byh byi byk eaa eab eae eah eai eak eba ebb ebe ebh ebi ebk eby eea eeb eee eek eey eha ehb ehe ehh ehi eia eib eie eii eik eka ekb eke ekh eki eky eya eye h-i haa hab hae hah hai hak hay hba hbb hbe hbh hbi hbk hby he- hea heb hee heh hei hek hey hha hhb hhe hhh hhi hhk hhy hia hib hie hih hii hik hka hkb hkh hki hkk hy- hya hyb hye hyh hyi hyy ia- iaa iab iae iah iai iba ibb ibe ibh ibi ibk iby ie- iea iee iei iek iey iha ihb ihe ihh ihi ihk ihy iia iib iie iih iii ika ikb ike iki ikk iya iye iyy ka- kaa kab kae kah kai kak kay kba kbb kbe kbh kbi kbk ke- kea keb kee keh kei kek key kha khe khh khi khk kia kib kie kih kii kik kkb kke kkh kki kkk kky kya kye yaa yab yae yah yai yak yay ybe ybi yby yea yeb yee yeh yei yek yey yha yhe yhi yie yih yii yka yki ykk yyb yye yyy