-ic a-a a-b a-c a-i aaa aab aac aai aam aan aar ab- aba abb abc abi abm abn abr ac- aca acb acc aci acm acn acr ai- aia aib aic aii aim ain air ama amb amc ami amm amn amr an- ana anb anc ani anm ann anr ar- ara arb arc ari arm arn arr baa bab bac bai bam ban bar bba bbb bbc bbi bbm bbn bbr bca bcb bcc bci bcm bcn bcr bi- bia bib bic bii bim bin bir bma bmb bmc bmi bmm bmn bmr bna bnb bnc bni bnn bnr bra brb bri brm brn brr c-- caa cab cac cai cam can car cba cbb cbc cbi cbm cbn cbr cca ccb ccc cci ccm ccn ccr ci- cia cib cic cii cim cin cir cma cmb cmc cmi cmm cmn cmr cn- cna cnb cnc cni cnm cnn cnr cra crb crc cri crm crn crr ia- iaa iab iac iai iam ian iar iba ibb ibc ibi ibm ibn ibr ica icb icc ici icm icn icr iia iib iic iii iim iin iir im- ima imb imc imi imm imn in- ina inb inc ini inm inn inr ir- ira irb irc iri irm irn irr m-r maa mab mac mai mam man mar mba mbb mbc mbi mbm mbr mc- mca mcb mcc mci mcm mcn mcr mi- mia mib mic mii mim min mir mma mmb mmc mmi mmm mmn mmr mna mnb mnc mni mnm mnn mnr mra mrb mrc mri mrm mrn mrr n-i naa nab nac nai nam nan nar nba nbb nbc nbi nbm nbn nbr nca ncb ncc nci ncm ncn ncr nia nib nic nii nim nin nir nma nmb nmc nmi nmm nmn nmr nna nnb nnc nni nnm nnn nra nrb nrc nri nrm nrn nrr ra- raa rab rac rai ram ran rar rba rbb rbc rbi rbm rbn rbr rca rcb rcc rci rcm rcn rcr ria rib ric rii rim rin rir rma rmb rmc rmi rmm rmn rmr rna rnb rnc rni rnm rnn rnr rra rrb rrc rri rrm rrn rrr