Converting a symbol to a paragraph in Word

Converting a symbol to a paragraph in Word

I would like to replace a "##" symbol in a document placed at multiple
sites with an entire paragraph in Microsoft word. The new paragraph needs
to be in a format listed below.
I tried to type in the paragraph into the "replace" area, but it doesn't
allow me to set up the paragraph with the ability to skip to the next
line. Please see the format of the final (paragraph) product.
Required format of the final paragraph
XXXXXXXXXXXXXXXXXXXXXXXXX
YYYYYYYYYYYYYYYYYYYYYY
ZZZZZZZZZZZZZZZZZZZZZZ
PPPPPPPPPPPPPPPPPPPPP
QQQQQQQQQQQQQQQQQQQQQQQQQ
How do I accomplish this?