-er -th a-a a-t aaa aae aah aar aat aax aea aee aeh aer aet aex aha ahe ahh ahr aht ahx ar- ara are arh arr art arx at- ata ate ath atr att atx ax- axa axe axh axr axt axx eaa eae eah ear eat eax eea eee eer eet eex eha ehe ehh ehr eht era ere erh err ert eta ete eth etr ett etx ex- exa exe exh exr ext exx haa hae hah har hat hax he- hea hee heh her het hex hha hhe hhh hhr hht hr- hra hre hrh hrr hrt hta hte hth htr htt htx ra- raa rae rah rar rat rax re- rea ree reh rer ret rex rh- rha rhe rhh rhr rht rra rrh rrr rrt rta rte rtr rtt rtx rxr t-x taa tae tah tar tat tax te- tea tee teh ter tet tex th- tha the thh thr tht thx tra tre trh trr trt trx tta tte tth ttr ttt ttx txe txt xaa xar xat xee xer xet xex xht xrt xrx xtr xtx xxx