It doesn't overwrite or obscure, it switches rendering direction. E.g. \u202E\u41\u42\u43 starts outputting from the right: \u41 from the right, then 42, then 4

It doesn't overwrite or obscure, it switches rendering direction. E.g. \u202E\u41\u42\u43 starts outputting from the right: \u41 from the right, then 42, then 43. That's CBA, altough in normal English you'd render that as ABC.