In Linux shell, when using recall mode, can't use Left Arrow Key to move cursor left and change mistyped numbers.
> ./hello -recall -hint 1
What do you remember?
aa 11^[[D^[[D <------ Left Arrow Key
You have entered: aa 11
Are you sure you remember it right?
Hint Part:
Totally Wrong! Don't you even remember the first 2 number(s)?⏎
But in Windows Powershell, Left Arrow Key works well.