-ey -ic a-a a-b a-c a-i aaa aab aac aae aai aak aay ab- aba abb abc abe abi abk aby ac- aca acb acc ace aci ack acy aea aeb aec aee aei aek aey ai- aia aib aic aie aii aik aiy aka akb akc ake aki akk ay- aya ayc aye ayi ayk baa bab bac bae bai bak bay bba bbb bbc bbe bbi bbk bby bca bcb bcc bce bci bck bcy be- bea beb bec bee bei bek bey bi- bia bib bic bie bii bik biy bka bkb bkc bke bkk by- bya byc bye byi byk c-- caa cab cac cae cai cak cay cba cbb cbc cbe cbi cbk cby cca ccb ccc cce cci cck ce- cea ceb cec cee cei cek cey ci- cia cib cic cie cii cik cka ckb ckc cki cky cya cyb cyc cye cyk eaa eab eac eae eai eak eba ebb ebc ebe ebi ebk eby ec- eca ecb ecc ece eci eck eea eeb eec eee eek eey eia eib eic eie eii eik eka ekb ekc eke eki eky eya eyc eye ia- iaa iab iac iae iai iba ibb ibc ibe ibi ibk iby ica icb icc ice ici ick icy ie- iea iec iee iei iek iey iia iib iic iie iii ika ikb ikc ike iki ikk iya iyc iye iyy ka- kaa kab kac kae kai kak kay kba kbb kbc kbe kbi kbk kca kcb kcc kce kci kck ke- kea keb kec kee kei kek key kia kib kic kie kii kik kkb kkc kke kki kkk kky kya kyc kye yaa yab yac yae yai yak yay ybc ybe ybi yby yca ycc yce yci ycy yea yeb yec yee yei yek yey yie yii yka yki ykk yyb yyc yye yyy