-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aar aat ab- aba abb abc abe abi abm abr abt ac- aca acb acc ace aci acm acr act aea aeb aec aee aei aem aer aet ai- aia aib aic aie aii aim air ait ama amb amc ame ami amm amr amt ar- ara arb arc are ari arm arr art at- ata atb atc ate ati atm atr att baa bab bac bae bai bam bar bat bba bbb bbc bbe bbi bbm bbr bbt bca bcb bcc bce bci bcm bcr bct be- bea beb bec bee bei bem ber bet bi- bia bib bic bie bii bim bir bit bma bmb bmc bme bmi bmm bmr bmt bra brb bre bri brm brr brt bta btb btc bte bti btm btr btt c-- caa cab cac cae cai cam car cat cba cbb cbc cbe cbi cbm cbr cbt cca ccb ccc cce cci ccm ccr cct ce- cea ceb cec cee cei cem cer cet ci- cia cib cic cie cii cim cir cit cma cmb cmc cme cmi cmm cmr cmt cra crb crc cre cri crm crr crt cta ctb ctc cte cti ctm ctr ctt eaa eab eac eae eai eam ear eat eba ebb ebc ebe ebi ebm ebr ebt ec- eca ecb ecc ece eci ecm ecr ect eea eeb eec eee eem eer eet eia eib eic eie eii eim eir eit em- ema emb emc eme emi emm emr emt era erb erc ere eri erm err ert eta etb etc ete eti etm etr ett ia- iaa iab iac iae iai iam iar iat iba ibb ibc ibe ibi ibm ibr ibt ica icb icc ice ici icm icr ict ie- iea iec iee iei iem ier iet iia iib iic iie iii iim iir iit im- ima imb imc ime imi imm imt ir- ira irb irc ire iri irm irr irt ita itb itc ite iti itm itt m-r maa mab mac mae mai mam mar mat mba mbb mbc mbe mbi mbm mbr mbt mc- mca mcb mcc mce mci mcm mcr mct mea meb mec mee mei mem mer met mi- mia mib mic mie mii mim mir mit mma mmb mmc mme mmi mmm mmr mmt mra mrb mrc mre mri mrm mrr mrt mta mtb mtc mte mti mtm mtr mtt ra- raa rab rac rae rai ram rar rat rba rbb rbc rbe rbi rbm rbr rbt rca rcb rcc rce rci rcm rcr rct re- rea reb rec ree rei rem rer ret ria rib ric rie rii rim rir rit rma rmb rmc rme rmi rmm rmr rmt rra rrb rrc rri rrm rrr rrt rta rtb rtc rte rti rtm rtr rtt taa tab tac tae tai tam tar tat tba tbb tbc tbe tbi tbm tbr tbt tca tcb tcc tce tci tcm tcr tct te- tea teb tec tee tei tem ter tet tia tib tic tie tii tim tir tit tma tmb tmc tme tmi tmm tmr tmt tra trb trc tre tri trm trr trt tta ttb ttc tte tti ttm ttr ttt