-ic a-a a-b a-c a-i aaa aab aac aai aam aan aar aas ab- aba abb abc abi abm abn abr abs ac- aca acb acc aci acm acn acr acs ai- aia aib aic aii aim ain air ais ama amb amc ami amm amn amr ams an- ana anb anc ani anm ann anr ans ar- ara arb arc ari arm arn arr ars as- asa asb asc asi asm asn asr ass baa bab bac bai bam ban bar bas bba bbb bbc bbi bbm bbn bbr bbs bca bcb bcc bci bcm bcn bcr bcs bi- bia bib bic bii bim bin bir bis bma bmb bmc bmi bmm bmn bmr bms bna bnb bnc bni bnn bnr bns bra brb bri brm brn brr brs bsa bsb bsc bsi bsm bsn bsr bss c-- caa cab cac cai cam can car cas cba cbb cbc cbi cbm cbn cbr cbs cca ccb ccc cci ccm ccn ccr ccs ci- cia cib cic cii cim cin cir cis cma cmb cmc cmi cmm cmn cmr cms cn- cna cnb cnc cni cnm cnn cnr cns cra crb crc cri crm crn crr crs csa csb csc csi csm csn csr css ia- iaa iab iac iai iam ian iar ias iba ibb ibc ibi ibm ibn ibr ibs ica icb icc ici icm icn icr ics iia iib iic iii iim iin iir iis im- ima imb imc imi imm imn ims in- ina inb inc ini inm inn inr ins ir- ira irb irc iri irm irn irr irs is- isa isb isc isi ism isn isr iss m-r maa mab mac mai mam man mar mas mba mbb mbc mbi mbm mbr mbs mc- mca mcb mcc mci mcm mcn mcr mcs mi- mia mib mic mii mim min mir mis mma mmb mmc mmi mmm mmn mmr mms mna mnb mnc mni mnm mnn mnr mns mra mrb mrc mri mrm mrn mrr mrs msa msb msc msi msm msn msr mss n-i naa nab nac nai nam nan nar nas nba nbb nbc nbi nbm nbn nbr nbs nca ncb ncc nci ncm ncn ncr ncs nia nib nic nii nim nin nir nis nma nmb nmc nmi nmm nmn nmr nms nna nnb nnc nni nnm nnn nns nra nrb nrc nri nrm nrn nrr nrs nsa nsb nsc nsi nsm nsn nsr nss ra- raa rab rac rai ram ran rar ras rba rbb rbc rbi rbm rbn rbr rbs rca rcb rcc rci rcm rcn rcr rcs ria rib ric rii rim rin rir ris rma rmb rmc rmi rmm rmn rmr rms rna rnb rnc rni rnm rnn rnr rns rra rrb rrc rri rrm rrn rrr rrs rsa rsb rsc rsi rsm rsn rsr rss saa sab sac sai sam san sar sas sba sbb sbc sbi sbm sbn sbr sbs sca scb scc sci scm scn scr scs sia sib sic sii sim sin sir sis sma smb smc smi smm smn smr sms sna snb snc sni snm snn snr sns sr- sra srb src sri srm srn srr srs ss- ssa ssb ssc ssi ssm ssn ssr sss