-er -ey -ic a-a a-b a-c a-i aaa aab aac aae aai aar aay ab- aba abb abc abe abi abr aby ac- aca acb acc ace aci acr acy aea aeb aec aee aei aer aey ai- aia aib aic aie aii air aiy ar- ara arb arc are ari arr ary ay- aya ayc aye ayi ayr baa bab bac bae bai bar bay bba bbb bbc bbe bbi bbr bby bca bcb bcc bce bci bcr bcy be- bea beb bec bee bei ber bey bi- bia bib bic bie bii bir biy bra brb bre bri brr bry by- bya byc bye byi byr c-- caa cab cac cae cai car cay cba cbb cbc cbe cbi cbr cby cca ccb ccc cce cci ccr ce- cea ceb cec cee cei cer cey ci- cia cib cic cie cii cir cra crb crc cre cri crr cry cya cyb cyc cye cyr eaa eab eac eae eai ear eba ebb ebc ebe ebi ebr eby ec- eca ecb ecc ece eci ecr eea eeb eec eee eer eey eia eib eic eie eii eir era erb erc ere eri err ery eya eyc eye eyr ia- iaa iab iac iae iai iar iba ibb ibc ibe ibi ibr iby ica icb icc ice ici icr icy ie- iea iec iee iei ier iey iia iib iic iie iii iir ir- ira irb irc ire iri irr iry iya iyc iye iyr iyy ra- raa rab rac rae rai rar ray rba rbb rbc rbe rbi rbr rca rcb rcc rce rci rcr re- rea reb rec ree rei rer rey ria rib ric rie rii rir riy rra rrb rrc rri rrr ry- rya ryc rye ryr ryy yaa yab yac yae yai yar yay ybc ybe ybi ybr yby yca ycc yce yci ycy yea yeb yec yee yei yer yey yie yii yir yra yrc yre yyb yyc yye yyy