-er -ey a-a a-b a-c aaa aab aac aae aah aar aay ab- aba abb abc abe abh abr aby ac- aca acb acc ace ach acr acy aea aeb aec aee aeh aer aey aha ahb ahc ahe ahh ahr ahy ar- ara arb arc are arh arr ary ay- aya ayc aye ayh ayr baa bab bac bae bah bar bay bba bbb bbc bbe bbh bbr bby bca bcb bcc bce bch bcr bcy be- bea beb bec bee beh ber bey bha bhb bhc bhe bhh bhr bra brb bre brh brr bry by- bya byc bye byh byr c-- caa cab cac cae cah car cay cba cbb cbc cbe cbh cbr cby cca ccb ccc cce cch ccr ce- cea ceb cec cee ceh cer cey ch- cha chb chc che chh chr chy cra crb crc cre crh crr cry cya cyb cyc cye cyr eaa eab eac eae eah ear eba ebb ebc ebe ebh ebr eby ec- eca ecb ecc ece ech ecr eea eeb eec eee eer eey eha ehb ehc ehe ehh ehr era erb erc ere erh err ery eya eyc eye eyr haa hab hac hae hah har hay hba hbb hbc hbe hbh hbr hby hca hcb hcc hce hch hcr hcy he- hea heb hec hee heh her hey hha hhb hhc hhe hhh hhr hhy hr- hra hrb hrc hre hrh hrr hy- hya hyb hyc hye hyh hyr hyy ra- raa rab rac rae rah rar ray rba rbb rbc rbe rbh rbr rca rcb rcc rce rch rcr re- rea reb rec ree reh rer rey rh- rha rhb rhc rhe rhh rhr rra rrb rrc rrh rrr ry- rya ryc rye ryr ryy yaa yab yac yae yah yar yay ybc ybe ybr yby yca ycc yce ych ycy yea yeb yec yee yeh yer yey yha yhc yhe yra yrc yre yyb yyc yye yyy