-ic a-a a-b a-c a-i aaa aab aac aai aam aar aas ab- aba abb abc abi abm abr abs ac- aca acb acc aci acm acr acs ai- aia aib aic aii aim air ais ama amb amc ami amm amr ams ar- ara arb arc ari arm arr ars as- asa asb asc asi asm asr ass baa bab bac bai bam bar bas bba bbb bbc bbi bbm bbr bbs bca bcb bcc bci bcm bcr bcs bi- bia bib bic bii bim bir bis bma bmb bmc bmi bmm bmr bms bra brb bri brm brr brs bsa bsb bsc bsi bsm bsr bss c-- caa cab cac cai cam car cas cba cbb cbc cbi cbm cbr cbs cca ccb ccc cci ccm ccr ccs ci- cia cib cic cii cim cir cis cma cmb cmc cmi cmm cmr cms cra crb crc cri crm crr crs csa csb csc csi csm csr css ia- iaa iab iac iai iam iar ias iba ibb ibc ibi ibm ibr ibs ica icb icc ici icm icr ics iia iib iic iii iim iir iis im- ima imb imc imi imm ims ir- ira irb irc iri irm irr irs is- isa isb isc isi ism isr iss m-r maa mab mac mai mam mar mas mba mbb mbc mbi mbm mbr mbs mc- mca mcb mcc mci mcm mcr mcs mi- mia mib mic mii mim mir mis mma mmb mmc mmi mmm mmr mms mra mrb mrc mri mrm mrr mrs msa msb msc msi msm msr mss ra- raa rab rac rai ram rar ras rba rbb rbc rbi rbm rbr rbs rca rcb rcc rci rcm rcr rcs ria rib ric rii rim rir ris rma rmb rmc rmi rmm rmr rms rra rrb rrc rri rrm rrr rrs rsa rsb rsc rsi rsm rsr rss saa sab sac sai sam sar sas sba sbb sbc sbi sbm sbr sbs sca scb scc sci scm scr scs sia sib sic sii sim sir sis sma smb smc smi smm smr sms sr- sra srb src sri srm srr srs ss- ssa ssb ssc ssi ssm ssr sss