In batch, how do I create spaces at the beginning of a input prompt string?

Let's say I have a batch file that has "padding" in it, and I want to indent the beginning of the prompt string for the user to type in. If I use spaces, it will not show up when run, it just ignores the spaces. This script for an example:

@echo off

echo.
echo.
echo    Hi.
echo    Please input something.
echo.
set /P input=   

After the = there is three spaces, and what I expect is that the marker for input is away from the edge of the command box, however these spaces are ignored.

How can I fix this problem? I am using Windows 7 SP1.