-er -ey -ic a-a a-b a-c a-i aaa aab aac aae aaf aai aar aay ab- aba abb abc abe abf abi abr aby ac- aca acb acc ace acf aci acr acy aea aeb aec aee aef aei aer aey af- afa afb afc afe aff afi afr afy ai- aia aib aic aie aif aii air aiy ar- ara arb arc are arf ari arr ary ay- aya ayc aye ayf ayi ayr baa bab bac bae baf bai bar bay bba bbb bbc bbe bbf bbi bbr bby bca bcb bcc bce bcf bci bcr bcy be- bea beb bec bee bef bei ber bey bfa bfb bfc bfe bff bfi bfr bfy bi- bia bib bic bie bif bii bir biy bra brb bre brf bri brr bry by- bya byc bye byf byi byr c-- caa cab cac cae caf cai car cay cba cbb cbc cbe cbf cbi cbr cby cca ccb ccc cce ccf cci ccr ce- cea ceb cec cee cef cei cer cey cfa cfb cfc cfe cff cfi cfr ci- cia cib cic cie cif cii cir cra crb crc cre crf cri crr cry cya cyb cyc cye cyf cyr eaa eab eac eae eaf eai ear eba ebb ebc ebe ebf ebi ebr eby ec- eca ecb ecc ece ecf eci ecr eea eeb eec eee eef eer eey ef- efa efb efc efe eff efi efr eia eib eic eie eif eii eir era erb erc ere erf eri err ery eya eyc eye eyr faa fab fac fae faf fai far fay fba fbb fbc fbe fbf fbi fbr fca fcb fcc fce fcf fci fcr fcy fea feb fec fee fef fei fer fey ffa ffc ffe fff ffi ffr ffy fia fib fic fie fif fii fir fra frb frc fre frf fri frr fry fy- fya fyb fyc fye fyi i-f ia- iaa iab iac iae iaf iai iar iba ibb ibc ibe ibf ibi ibr iby ica icb icc ice icf ici icr icy ie- iea iec iee ief iei ier iey ifa ifb ifc ife iff ifi ifr ify iia iib iic iie iif iii iir ir- ira irb irc ire irf iri irr iry iya iyc iye iyr iyy ra- raa rab rac rae raf rai rar ray rba rbb rbc rbe rbf rbi rbr rca rcb rcc rce rcf rci rcr re- rea reb rec ree ref rei rer rey rfa rfb rfc rfe rff rfi rfr ria rib ric rie rif rii rir riy rra rrb rrc rrf rri rrr ry- rya ryc rye ryf ryr ryy yaa yab yac yae yaf yai yar yay ybc ybe ybf ybi ybr yby yca ycc yce ycf yci ycy yea yeb yec yee yef yei yer yey yfa yfc yfe yff yfr yie yif yii yir yra yrc yre yrf yyb yyc yye yyf yyy