-ic a-a a-b a-c a-i a-t aaa aab aac aai aam aar aat ab- aba abb abc abi abm abr abt ac- aca acb acc aci acm acr act ai- aia aib aic aii aim air ait ama amb amc ami amm amr amt ar- ara arb arc ari arm arr art at- ata atb atc ati atm atr att baa bab bac bai bam bar bat bba bbb bbc bbi bbm bbr bbt bca bcb bcc bci bcm bcr bct bi- bia bib bic bii bim bir bit bma bmb bmc bmi bmm bmr bmt bra brb bri brm brr brt bta btb btc bti btm btr btt c-- caa cab cac cai cam car cat cba cbb cbc cbi cbm cbr cbt cca ccb ccc cci ccm ccr cct ci- cia cib cic cii cim cir cit cma cmb cmc cmi cmm cmr cmt cra crb crc cri crm crr crt cta ctb ctc cti ctm ctr ctt ia- iaa iab iac iai iam iar iat iba ibb ibc ibi ibm ibr ibt ica icb icc ici icm icr ict iia iib iic iii iim iir iit im- ima imb imc imi imm imt ir- ira irb irc iri irm irr irt ita itb itc iti itm itt m-r maa mab mac mai mam mar mat mba mbb mbc mbi mbm mbr mbt mc- mca mcb mcc mci mcm mcr mct mi- mia mib mic mii mim mir mit mma mmb mmc mmi mmm mmr mmt mra mrb mrc mri mrm mrr mrt mta mtb mtc mti mtm mtr mtt ra- raa rab rac rai ram rar rat rba rbb rbc rbi rbm rbr rbt rca rcb rcc rci rcm rcr rct ria rib ric rii rim rir rit rma rmb rmc rmi rmm rmr rmt rra rrb rrc rri rrm rrr rrt rta rtb rtc rti rtm rtr rtt taa tab tac tai tam tar tat tba tbb tbc tbi tbm tbr tbt tca tcb tcc tci tcm tcr tct tia tib tic tii tim tir tit tma tmb tmc tmi tmm tmr tmt tra trb trc tri trm trr trt tta ttb ttc tti ttm ttr ttt