-th a-a a-b a-c a-t aaa aab aac aad aah aar aat ab- aba abb abc abd abh abr abt ac- aca acb acc acd ach acr act ad- ada adb adc add adh adr adt aha ahb ahc ahd ahh ahr aht ar- ara arb arc ard arh arr art at- ata atb atc atd ath atr att baa bab bac bad bah bar bat bba bbb bbc bbd bbh bbr bbt bca bcb bcc bcd bch bcr bct bda bdb bdc bdd bdh bdr bdt bha bhb bhc bhd bhh bhr bht bra brb brd brh brr brt bta btb btc btd bth btr btt c-- caa cab cac cad cah car cat cba cbb cbc cbd cbh cbr cbt cca ccb ccc ccd cch ccr cct cda cdb cdc cdd cdh cdr cdt ch- cha chb chc chd chh chr cht cra crb crc crd crh crr crt cta ctb ctc ctd cth ctr ctt daa dab dac dad dah dar dat dba dbb dbc dbd dbh dbr dbt dca dcb dcc dcd dcr dct dda ddb ddc ddd ddh ddr ddt dh- dha dhb dhc dhd dhh dhr dht dra drb drc drd drr drt dta dtb dtc dtd dth dtr dtt haa hab hac had hah har hat hba hbb hbc hbd hbh hbr hbt hca hcb hcc hcd hch hcr hct hda hdb hdc hdd hdh hdr hdt hha hhb hhc hhd hhh hhr hht hr- hra hrb hrc hrd hrh hrr hrt hta htb htc htd hth htr htt ra- raa rab rac rad rah rar rat rba rbb rbc rbd rbh rbr rbt rca rcb rcc rcd rch rcr rct rda rdb rdc rdd rdh rdr rdt rh- rha rhb rhc rhd rhh rhr rht rra rrb rrc rrd rrh rrr rrt rta rtb rtc rtd rtr rtt taa tab tac tad tah tar tat tba tbb tbc tbd tbh tbr tbt tca tcb tcc tcd tch tcr tct tda tdb tdc tdd tdh tdr tdt th- tha thb thc thd thh thr tht tra trb trc trd trh trr trt tta ttb ttc ttd tth ttr ttt