prompt $t$g (as in the currently accepted answer) results in a prompt as in this example:
prompt $P - $T$H$H$H$G (as in the previously posted answer) results in a prompt like in this example:
C:\Users\Pierre.Vriens - 14:32:46>
prompt $T$H$H$H$H$H$H$G (as mentioned also in a comment from OPer below the currently accepted answer) results in a prompt like in this example:
So it looks like this attempt (= nr 3) is the correct answer ... (Credits: Daniel Williams), because:
$T results in
$H$H$H$H$H$H performs, 6 times, a backspace (i.e. removes the
:46,28 part of that).
> to it again.