-ic a-a a-b a-c a-i a-t aaa aab aac aai aam aar aas aat ab- aba abb abc abi abm abr abs abt ac- aca acb acc aci acm acr acs act ai- aia aib aic aii aim air ais ait ama amb amc ami amm amr ams amt ar- ara arb arc ari arm arr ars art as- asa asb asc asi asm asr ass ast at- ata atb atc ati atm atr ats att baa bab bac bai bam bar bas bat bba bbb bbc bbi bbm bbr bbs bbt bca bcb bcc bci bcm bcr bcs bct bi- bia bib bic bii bim bir bis bit bma bmb bmc bmi bmm bmr bms bmt bra brb bri brm brr brs brt bsa bsb bsc bsi bsm bsr bss bst bta btb btc bti btm btr bts btt c-- caa cab cac cai cam car cas cat cba cbb cbc cbi cbm cbr cbs cbt cca ccb ccc cci ccm ccr ccs cct ci- cia cib cic cii cim cir cis cit cma cmb cmc cmi cmm cmr cms cmt cra crb crc cri crm crr crs crt csa csb csc csi csm csr css cst cta ctb ctc cti ctm ctr cts ctt ia- iaa iab iac iai iam iar ias iat iba ibb ibc ibi ibm ibr ibs ibt ica icb icc ici icm icr ics ict iia iib iic iii iim iir iis iit im- ima imb imc imi imm ims imt ir- ira irb irc iri irm irr irs irt is- isa isb isc isi ism isr iss ist ita itb itc iti itm its itt m-r maa mab mac mai mam mar mas mat mba mbb mbc mbi mbm mbr mbs mbt mc- mca mcb mcc mci mcm mcr mcs mct mi- mia mib mic mii mim mir mis mit mma mmb mmc mmi mmm mmr mms mmt mra mrb mrc mri mrm mrr mrs mrt msa msb msc msi msm msr mss mst mta mtb mtc mti mtm mtr mts mtt ra- raa rab rac rai ram rar ras rat rba rbb rbc rbi rbm rbr rbs rbt rca rcb rcc rci rcm rcr rcs rct ria rib ric rii rim rir ris rit rma rmb rmc rmi rmm rmr rms rmt rra rrb rrc rri rrm rrr rrs rrt rsa rsb rsc rsi rsm rsr rss rst rta rtb rtc rti rtm rtr rts rtt saa sab sac sai sam sar sas sat sba sbb sbc sbi sbm sbr sbs sbt sca scb scc sci scm scr scs sct sia sib sic sii sim sir sis sit sma smb smc smi smm smr sms smt sr- sra srb src sri srm srr srs srt ss- ssa ssb ssc ssi ssm ssr sss sst sta stb stc sti stm str sts stt taa tab tac tai tam tar tas tat tba tbb tbc tbi tbm tbr tbs tbt tca tcb tcc tci tcm tcr tcs tct tia tib tic tii tim tir tis tit tma tmb tmc tmi tmm tmr tms tmt tra trb trc tri trm trr trs trt tsa tsb tsc tsi tsm tsr tss tst tta ttb ttc tti ttm ttr tts ttt