Pen and paper:
You have to wrinkle the one; Almost like a "Z" but with a round upper part! Then make the loops of the three nines much larger, so that the bottom tails vanish!
Keyboard:
Retain the relative finger movements, but translate them one key width to the right!
Now let's see: 1999 2000 2000 2000
Yjrm<<<< Then go back again!