-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aar aas aat ab- aba abb abc abe abi abm abr abs abt ac- aca acb acc ace aci acm acr acs act aea aeb aec aee aei aem aer aes aet ai- aia aib aic aie aii aim air ais ait ama amb amc ame ami amm amr ams amt ar- ara arb arc are ari arm arr ars art as- asa asb asc ase asi asm asr ass ast at- ata atb atc ate ati atm atr ats att baa bab bac bae bai bam bar bas bat bba bbb bbc bbe bbi bbm bbr bbs bbt bca bcb bcc bce bci bcm bcr bcs bct be- bea beb bec bee bei bem ber bes bet bi- bia bib bic bie bii bim bir bis bit bma bmb bmc bme bmi bmm bmr bms bmt bra brb bre bri brm brr brs brt bsa bsb bsc bse bsi bsm bsr bss bst bta btb btc bte bti btm btr bts btt c-- caa cab cac cae cai cam car cas cat cba cbb cbc cbe cbi cbm cbr cbs cbt cca ccb ccc cce cci ccm ccr ccs cct ce- cea ceb cec cee cei cem cer ces cet ci- cia cib cic cie cii cim cir cis cit cma cmb cmc cme cmi cmm cmr cms cmt cra crb crc cre cri crm crr crs crt csa csb csc cse csi csm csr css cst cta ctb ctc cte cti ctm ctr cts ctt eaa eab eac eae eai eam ear eas eat eba ebb ebc ebe ebi ebm ebr ebs ebt ec- eca ecb ecc ece eci ecm ecr ecs ect eea eeb eec eee eem eer ees eet eia eib eic eie eii eim eir eis eit em- ema emb emc eme emi emm emr ems emt era erb erc ere eri erm err ers ert es- esa esb esc ese esi esm esr ess est eta etb etc ete eti etm etr ets ett ia- iaa iab iac iae iai iam iar ias iat iba ibb ibc ibe ibi ibm ibr ibs ibt ica icb icc ice ici icm icr ics ict ie- iea iec iee iei iem ier ies iet iia iib iic iie iii iim iir iis iit im- ima imb imc ime imi imm ims imt ir- ira irb irc ire iri irm irr irs irt is- isa isb isc ise isi ism isr iss ist ita itb itc ite iti itm its itt m-r maa mab mac mae mai mam mar mas mat mba mbb mbc mbe mbi mbm mbr mbs mbt mc- mca mcb mcc mce mci mcm mcr mcs mct mea meb mec mee mei mem mer mes met mi- mia mib mic mie mii mim mir mis mit mma mmb mmc mme mmi mmm mmr mms mmt mra mrb mrc mre mri mrm mrr mrs mrt msa msb msc mse msi msm msr mss mst mta mtb mtc mte mti mtm mtr mts mtt ra- raa rab rac rae rai ram rar ras rat rba rbb rbc rbe rbi rbm rbr rbs rbt rca rcb rcc rce rci rcm rcr rcs rct re- rea reb rec ree rei rem rer res ret ria rib ric rie rii rim rir ris rit rma rmb rmc rme rmi rmm rmr rms rmt rra rrb rrc rri rrm rrr rrs rrt rsa rsb rsc rse rsi rsm rsr rss rst rta rtb rtc rte rti rtm rtr rts rtt saa sab sac sae sai sam sar sas sat sba sbb sbc sbe sbi sbm sbr sbs sbt sca scb scc sce sci scm scr scs sct se- sea seb sec see sei sem ser ses set sia sib sic sie sii sim sir sis sit sma smb smc sme smi smm smr sms smt sr- sra srb src sre sri srm srr srs srt ss- ssa ssb ssc sse ssi ssm ssr sss sst sta stb stc ste sti stm str sts stt taa tab tac tae tai tam tar tas tat tba tbb tbc tbe tbi tbm tbr tbs tbt tca tcb tcc tce tci tcm tcr tcs tct te- tea teb tec tee tei tem ter tes tet tia tib tic tie tii tim tir tis tit tma tmb tmc tme tmi tmm tmr tms tmt tra trb trc tre tri trm trr trs trt tsa tsb tsc tse tsi tsm tsr tss tst tta ttb ttc tte tti ttm ttr tts ttt