Make a custom rubber stamp!
I did a couple Doctor Who related stamps...heres the TARDIS and a DALEK
This one is simple and could be made with a pink school eraser!
Draw out what you want on scrap paper.
Then trace the word you wrote so it reads backwards...
Use a pencil to trace the outline and the "hello"
Don't push the knife in very deep...just a little cut will do it.
Then cut another line just slightly larger than the one you did first.
Cutting in at a little angle so you end up cutting a thin little ravine.
Until you are satisfied!
Then ink it up and see how it works!