-ic a-a a-b a-c a-i aaa aab aac aai aan aar aas aay ab- aba abb abc abi abn abr abs aby ac- aca acb acc aci acn acr acs acy ai- aia aib aic aii ain air ais aiy an- ana anb anc ani ann anr ans any ar- ara arb arc ari arn arr ars ary as- asa asb asc asi asn asr ass asy ay- aya ayc ayi ayn ayr ays baa bab bac bai ban bar bas bay bba bbb bbc bbi bbn bbr bbs bby bca bcb bcc bci bcn bcr bcs bcy bi- bia bib bic bii bin bir bis biy bna bnb bnc bni bnn bnr bns bra brb bri brn brr brs bry bsa bsb bsc bsi bsn bsr bss bsy by- bya byc byi byn byr bys c-- caa cab cac cai can car cas cay cba cbb cbc cbi cbn cbr cbs cby cca ccb ccc cci ccn ccr ccs ci- cia cib cic cii cin cir cis cn- cna cnb cnc cni cnn cnr cns cny cra crb crc cri crn crr crs cry csa csb csc csi csn csr css csy cya cyb cyc cyn cyr cys ia- iaa iab iac iai ian iar ias iba ibb ibc ibi ibn ibr ibs iby ica icb icc ici icn icr ics icy iia iib iic iii iin iir iis in- ina inb inc ini inn inr ins iny ir- ira irb irc iri irn irr irs iry is- isa isb isc isi isn isr iss isy iya iyc iyr iys iyy n-i naa nab nac nai nan nar nas nay nba nbb nbc nbi nbn nbr nbs nca ncb ncc nci ncn ncr ncs nia nib nic nii nin nir nis nna nnb nnc nni nnn nns nra nrb nrc nri nrn nrr nrs nry nsa nsb nsc nsi nsn nsr nss nsy nya nyc nyn nys nyy ra- raa rab rac rai ran rar ras ray rba rbb rbc rbi rbn rbr rbs rca rcb rcc rci rcn rcr rcs ria rib ric rii rin rir ris riy rna rnb rnc rni rnn rnr rns rny rra rrb rrc rri rrn rrr rrs rsa rsb rsc rsi rsn rsr rss ry- rya ryc ryn ryr rys ryy saa sab sac sai san sar sas say sba sbb sbc sbi sbn sbr sbs sby sca scb scc sci scn scr scs sia sib sic sii sin sir sis sna snb snc sni snn snr sns sny sr- sra srb src sri srn srr srs sry ss- ssa ssb ssc ssi ssn ssr sss sy- sya syb syc syi syn syr sys yaa yab yac yai yan yar yas yay ybc ybi ybr ybs yby yca ycc yci ycs ycy yii yin yir yis yna ynn yns yny yra yrc yrn yrs ysa ysb ysc ysi ysr yss ysy yyb yyc yys yyy