-er -th a-a a-b a-c a-t aaa aab aac aad aae aah aar aat ab- aba abb abc abd abe abh abr abt ac- aca acb acc acd ace ach acr act ad- ada adb adc add ade adh adr adt aea aeb aec aed aee aeh aer aet aha ahb ahc ahd ahe ahh ahr aht ar- ara arb arc ard are arh arr art at- ata atb atc atd ate ath atr att baa bab bac bad bae bah bar bat bba bbb bbc bbd bbe bbh bbr bbt bca bcb bcc bcd bce bch bcr bct bda bdb bdc bdd bde bdh bdr bdt be- bea beb bec bed bee beh ber bet bha bhb bhc bhd bhe bhh bhr bht bra brb brd bre brh brr brt bta btb btc btd bte bth btr btt c-- caa cab cac cad cae cah car cat cba cbb cbc cbd cbe cbh cbr cbt cca ccb ccc ccd cce cch ccr cct cda cdb cdc cdd cde cdh cdr cdt ce- cea ceb cec ced cee ceh cer cet ch- cha chb chc chd che chh chr cht cra crb crc crd cre crh crr crt cta ctb ctc ctd cte cth ctr ctt daa dab dac dad dae dah dar dat dba dbb dbc dbd dbe dbh dbr dbt dca dcb dcc dcd dce dcr dct dda ddb ddc ddd dde ddh ddr ddt de- dea deb dec ded dee deh der det dh- dha dhb dhc dhd dhe dhh dhr dht dra drb drc drd dre drr drt dta dtb dtc dtd dte dth dtr dtt eaa eab eac ead eae eah ear eat eba ebb ebc ebd ebe ebh ebr ebt ec- eca ecb ecc ecd ece ech ecr ect ed- eda edb edc edd ede edh edr edt eea eeb eec eed eee eer eet eha ehb ehc ehd ehe ehh ehr eht era erb erc erd ere erh err ert eta etb etc etd ete eth etr ett haa hab hac had hae hah har hat hba hbb hbc hbd hbe hbh hbr hbt hca hcb hcc hcd hce hch hcr hct hda hdb hdc hdd hde hdh hdr hdt he- hea heb hec hed hee heh her het hha hhb hhc hhd hhe hhh hhr hht hr- hra hrb hrc hrd hre hrh hrr hrt hta htb htc htd hte hth htr htt ra- raa rab rac rad rae rah rar rat rba rbb rbc rbd rbe rbh rbr rbt rca rcb rcc rcd rce rch rcr rct rda rdb rdc rdd rde rdh rdr rdt re- rea reb rec red ree reh rer ret rh- rha rhb rhc rhd rhe rhh rhr rht rra rrb rrc rrd rrh rrr rrt rta rtb rtc rtd rte rtr rtt taa tab tac tad tae tah tar tat tba tbb tbc tbd tbe tbh tbr tbt tca tcb tcc tcd tce tch tcr tct tda tdb tdc tdd tde tdh tdr tdt te- tea teb tec ted tee teh ter tet th- tha thb thc thd the thh thr tht tra trb trc trd tre trh trr trt tta ttb ttc ttd tte tth ttr ttt