-ic a-a a-b a-c a-i aaa aab aac aai aan aar aay ab- aba abb abc abi abn abr aby ac- aca acb acc aci acn acr acy ai- aia aib aic aii ain air aiy an- ana anb anc ani ann anr any ar- ara arb arc ari arn arr ary ay- aya ayc ayi ayn ayr baa bab bac bai ban bar bay bba bbb bbc bbi bbn bbr bby bca bcb bcc bci bcn bcr bcy bi- bia bib bic bii bin bir biy bna bnb bnc bni bnn bnr bra brb bri brn brr bry by- bya byc byi byn byr c-- caa cab cac cai can car cay cba cbb cbc cbi cbn cbr cby cca ccb ccc cci ccn ccr ci- cia cib cic cii cin cir cn- cna cnb cnc cni cnn cnr cny cra crb crc cri crn crr cry cya cyb cyc cyn cyr ia- iaa iab iac iai ian iar iba ibb ibc ibi ibn ibr iby ica icb icc ici icn icr icy iia iib iic iii iin iir in- ina inb inc ini inn inr iny ir- ira irb irc iri irn irr iry iya iyc iyr iyy n-i naa nab nac nai nan nar nay nba nbb nbc nbi nbn nbr nca ncb ncc nci ncn ncr nia nib nic nii nin nir nna nnb nnc nni nnn nra nrb nrc nri nrn nrr nry nya nyc nyn nyy ra- raa rab rac rai ran rar ray rba rbb rbc rbi rbn rbr rca rcb rcc rci rcn rcr ria rib ric rii rin rir riy rna rnb rnc rni rnn rnr rny rra rrb rrc rri rrn rrr ry- rya ryc ryn ryr ryy yaa yab yac yai yan yar yay ybc ybi ybr yby yca ycc yci ycy yii yin yir yna ynn yny yra yrc yrn yyb yyc yyy