-ic a-a a-b a-c a-i a-z aaa aab aac aai aan aar aaz ab- aba abb abc abi abn abr abz ac- aca acb acc aci acn acr acz ai- aia aib aic aii ain air aiz an- ana anb anc ani ann anr anz ar- ara arb arc ari arn arr arz az- aza azb azi azn azz baa bab bac bai ban bar baz bba bbb bbc bbi bbn bbr bca bcb bcc bci bcn bcr bcz bi- bia bib bic bii bin bir biz bna bnb bnc bni bnn bnr bnz bra brb bri brn brr brz bza bzn bzr bzz c-- caa cab cac cai can car caz cba cbb cbc cbi cbn cbr cbz cca ccb ccc cci ccn ccr ccz ci- cia cib cic cii cin cir cn- cna cnb cnc cni cnn cnr cra crb crc cri crn crr crz cz- czc ia- iaa iab iac iai ian iar iaz iba ibb ibc ibi ibn ibr ibz ica icb icc ici icn icr icz iia iib iic iii iin iir in- ina inb inc ini inn inr ir- ira irb irc iri irn irr iza izi izz n-i naa nab nac nai nan nar naz nba nbb nbc nbi nbn nbr nca ncb ncc nci ncn ncr nia nib nic nii nin nir niz nna nnb nnc nni nnn nnz nra nrb nrc nri nrn nrr nrz nzb nzi nzz ra- raa rab rac rai ran rar raz rba rbb rbc rbi rbn rbr rca rcb rcc rci rcn rcr ria rib ric rii rin rir riz rna rnb rnc rni rnn rnr rnz rra rrb rrc rri rrn rrr rza rzb zaa zab zac zai zan zar zaz zbb zbc zbr zia zib zin zir ziz znc znn zzr zzz