-er -th a-a a-c a-t aaa aac aad aae aah aar aat aax ac- aca acc acd ace ach acr act acx ad- ada adc add ade adh adr adt adx aea aec aed aee aeh aer aet aex aha ahc ahd ahe ahh ahr aht ahx ar- ara arc ard are arh arr art arx at- ata atc atd ate ath atr att atx ax- axa axe axh axr axt axx c-- caa cac cad cae cah car cat cax cca ccc ccd cce cch ccr cct ccx cda cdc cdd cde cdh cdr cdt cdx ce- cea cec ced cee ceh cer cet cex ch- cha chc chd che chh chr cht chx cra crc crd cre crh crr crt crx cta ctc ctd cte cth ctr ctt ctx cxc cxh cxr cxt cxx daa dac dad dae dah dar dat dax dca dcc dcd dce dcr dct dcx dda ddc ddd dde ddh ddr ddt ddx de- dea dec ded dee deh der det dex dh- dha dhc dhd dhe dhh dhr dht dra drc drd dre drr drt drx dta dtc dtd dte dth dtr dtt dtx dxc dxd dxr dxt dxx eaa eac ead eae eah ear eat eax ec- eca ecc ecd ece ech ecr ect ecx ed- eda edc edd ede edh edr edt edx eea eec eed eee eer eet eex eha ehc ehd ehe ehh ehr eht era erc erd ere erh err ert eta etc etd ete eth etr ett etx ex- exa exc exd exe exh exr ext exx haa hac had hae hah har hat hax hca hcc hcd hce hch hcr hct hda hdc hdd hde hdh hdr hdt hdx he- hea hec hed hee heh her het hex hha hhc hhd hhe hhh hhr hht hr- hra hrc hrd hre hrh hrr hrt hta htc htd hte hth htr htt htx hxc hxd ra- raa rac rad rae rah rar rat rax rca rcc rcd rce rch rcr rct rcx rda rdc rdd rde rdh rdr rdt rdx re- rea rec red ree reh rer ret rex rh- rha rhc rhd rhe rhh rhr rht rra rrc rrd rrh rrr rrt rta rtc rtd rte rtr rtt rtx rxr t-x taa tac tad tae tah tar tat tax tca tcc tcd tce tch tcr tct tcx tda tdc tdd tde tdh tdr tdt tdx te- tea tec ted tee teh ter tet tex th- tha thc thd the thh thr tht thx tra trc trd tre trh trr trt trx tta ttc ttd tte tth ttr ttt ttx txe txt xaa xac xad xar xat xcd xch xcr xcx xda xdc xde xdh xdr xdt xed xee xer xet xex xhd xht xrc xrd xrt xrx xtc xtr xtx xxx