-er -th a-a a-c a-t aaa aac aad aae aah aar aat ac- aca acc acd ace ach acr act ad- ada adc add ade adh adr adt aea aec aed aee aeh aer aet aha ahc ahd ahe ahh ahr aht ar- ara arc ard are arh arr art at- ata atc atd ate ath atr att c-- caa cac cad cae cah car cat cca ccc ccd cce cch ccr cct cda cdc cdd cde cdh cdr cdt ce- cea cec ced cee ceh cer cet ch- cha chc chd che chh chr cht cra crc crd cre crh crr crt cta ctc ctd cte cth ctr ctt daa dac dad dae dah dar dat dca dcc dcd dce dcr dct dda ddc ddd dde ddh ddr ddt de- dea dec ded dee deh der det dh- dha dhc dhd dhe dhh dhr dht dra drc drd dre drr drt dta dtc dtd dte dth dtr dtt eaa eac ead eae eah ear eat ec- eca ecc ecd ece ech ecr ect ed- eda edc edd ede edh edr edt eea eec eed eee eer eet eha ehc ehd ehe ehh ehr eht era erc erd ere erh err ert eta etc etd ete eth etr ett haa hac had hae hah har hat hca hcc hcd hce hch hcr hct hda hdc hdd hde hdh hdr hdt he- hea hec hed hee heh her het hha hhc hhd hhe hhh hhr hht hr- hra hrc hrd hre hrh hrr hrt hta htc htd hte hth htr htt ra- raa rac rad rae rah rar rat rca rcc rcd rce rch rcr rct rda rdc rdd rde rdh rdr rdt re- rea rec red ree reh rer ret rh- rha rhc rhd rhe rhh rhr rht rra rrc rrd rrh rrr rrt rta rtc rtd rte rtr rtt taa tac tad tae tah tar tat tca tcc tcd tce tch tcr tct tda tdc tdd tde tdh tdr tdt te- tea tec ted tee teh ter tet th- tha thc thd the thh thr tht tra trc trd tre trh trr trt tta ttc ttd tte tth ttr ttt