a-a a-b a-c a-t aaa aab aac aak aam aar aas aat ab- aba abb abc abk abm abr abs abt ac- aca acb acc ack acm acr acs act aka akb akc akk akm akr aks ama amb amc amk amm amr ams amt ar- ara arb arc ark arm arr ars art as- asa asb asc ask asm asr ass ast at- ata atb atc atm atr ats att baa bab bac bak bam bar bas bat bba bbb bbc bbk bbm bbr bbs bbt bca bcb bcc bck bcm bcr bcs bct bka bkb bkc bkk bkm bkr bks bkt bma bmb bmc bmk bmm bmr bms bmt bra brb brk brm brr brs brt bsa bsb bsc bsk bsm bsr bss bst bta btb btc btk btm btr bts btt c-- caa cab cac cak cam car cas cat cba cbb cbc cbk cbm cbr cbs cbt cca ccb ccc cck ccm ccr ccs cct cka ckb ckc ckm cks ckt cma cmb cmc cmk cmm cmr cms cmt cra crb crc crk crm crr crs crt csa csb csc csk csm csr css cst cta ctb ctc ctk ctm ctr cts ctt k-t ka- kaa kab kac kak kam kar kas kat kba kbb kbc kbk kbm kbr kbs kca kcb kcc kck kcm kcr kcs kct kkb kkc kkk kkm kkr kks kkt kma kmb kmc kmk kmm kms kmt kra krc krk krr krs krt ksa ksb ksc ksk ksm ksr kss kst kta ktb ktc ktk ktm ktr kts ktt m-r maa mab mac mak mam mar mas mat mba mbb mbc mbk mbm mbr mbs mbt mc- mca mcb mcc mck mcm mcr mcs mct mka mkb mkc mkk mkm mkr mks mkt mma mmb mmc mmk mmm mmr mms mmt mra mrb mrc mrk mrm mrr mrs mrt msa msb msc msk msm msr mss mst mta mtb mtc mtk mtm mtr mts mtt ra- raa rab rac rak ram rar ras rat rba rbb rbc rbk rbm rbr rbs rbt rca rcb rcc rcm rcr rcs rct rkb rkc rkk rkm rks rkt rma rmb rmc rmm rmr rms rmt rra rrb rrc rrk rrm rrr rrs rrt rsa rsb rsc rsk rsm rsr rss rst rta rtb rtc rtk rtm rtr rts rtt saa sab sac sak sam sar sas sat sba sbb sbc sbk sbm sbr sbs sbt sca scb scc sck scm scr scs sct sk- ska skb skc skk skm skr sks skt sma smb smc smk smm smr sms smt sr- sra srb src srk srm srr srs srt ss- ssa ssb ssc ssk ssm ssr sss sst sta stb stc stk stm str sts stt taa tab tac tak tam tar tas tat tba tbb tbc tbk tbm tbr tbs tbt tca tcb tcc tck tcm tcr tcs tct tka tkb tkc tkk tkm tkr tks tkt tma tmb tmc tmk tmm tmr tms tmt tra trb trc trk trm trr trs trt tsa tsb tsc tsk tsm tsr tss tst tta ttb ttc ttk ttm ttr tts ttt