-ic a-a a-b a-c a-i aaa aab aac aai aak aam aar aas ab- aba abb abc abi abk abm abr abs ac- aca acb acc aci ack acm acr acs ai- aia aib aic aii aik aim air ais aka akb akc aki akk akm akr aks ama amb amc ami amk amm amr ams ar- ara arb arc ari ark arm arr ars as- asa asb asc asi ask asm asr ass baa bab bac bai bak bam bar bas bba bbb bbc bbi bbk bbm bbr bbs bca bcb bcc bci bck bcm bcr bcs bi- bia bib bic bii bik bim bir bis bka bkb bkc bkk bkm bkr bks bma bmb bmc bmi bmk bmm bmr bms bra brb bri brk brm brr brs bsa bsb bsc bsi bsk bsm bsr bss c-- caa cab cac cai cak cam car cas cba cbb cbc cbi cbk cbm cbr cbs cca ccb ccc cci cck ccm ccr ccs ci- cia cib cic cii cik cim cir cis cka ckb ckc cki ckm cks cma cmb cmc cmi cmk cmm cmr cms cra crb crc cri crk crm crr crs csa csb csc csi csk csm csr css ia- iaa iab iac iai iam iar ias iba ibb ibc ibi ibk ibm ibr ibs ica icb icc ici ick icm icr ics iia iib iic iii iim iir iis ika ikb ikc iki ikk ikr iks im- ima imb imc imi imm ims ir- ira irb irc iri irk irm irr irs is- isa isb isc isi isk ism isr iss ka- kaa kab kac kai kak kam kar kas kba kbb kbc kbi kbk kbm kbr kbs kca kcb kcc kci kck kcm kcr kcs kia kib kic kii kik kim kir kis kkb kkc kki kkk kkm kkr kks kma kmb kmc kmi kmk kmm kms kra krc kri krk krr krs ksa ksb ksc ksi ksk ksm ksr kss m-r maa mab mac mai mak mam mar mas mba mbb mbc mbi mbk mbm mbr mbs mc- mca mcb mcc mci mck mcm mcr mcs mi- mia mib mic mii mik mim mir mis mka mkb mkc mkk mkm mkr mks mma mmb mmc mmi mmk mmm mmr mms mra mrb mrc mri mrk mrm mrr mrs msa msb msc msi msk msm msr mss ra- raa rab rac rai rak ram rar ras rba rbb rbc rbi rbk rbm rbr rbs rca rcb rcc rci rcm rcr rcs ria rib ric rii rik rim rir ris rkb rkc rkk rkm rks rma rmb rmc rmi rmm rmr rms rra rrb rrc rri rrk rrm rrr rrs rsa rsb rsc rsi rsk rsm rsr rss saa sab sac sai sak sam sar sas sba sbb sbc sbi sbk sbm sbr sbs sca scb scc sci sck scm scr scs sia sib sic sii sik sim sir sis sk- ska skb skc ski skk skm skr sks sma smb smc smi smk smm smr sms sr- sra srb src sri srk srm srr srs ss- ssa ssb ssc ssi ssk ssm ssr sss