We can actually shorten this a bit, e.g. "She's not here", or "She isn't here"
But can we go any further in shortening it so that it become "She'sn't here"?
Now compare the number of characters in every version:
She is not hereArrgghh $%^&*&£$"$"$&*()#~?!
She's not here
She isn't here