A relation of 8s and 4s

Sitting against the window, Harmony was thinking about a letter of hers. It had contained only the numbers 8 and 4. Furthermore, it as from a close friend. She opened it again.

Dear Harmony,
I hope this finds you well
So you went to a new school?
Here is what I want to say about it-
84 48 48 84848 48 48484488484 8 4 84848 4 488 484 84 84 84 4 48 4 4884 84 84 8448 84848484 84 84 4848 844884 84 84 48 48 84 84 84 48 84 4888888888 844884 84444844 848 8848484 48488484848484888484848484 48 84 48488 4 48 484 848 48484884 4 84 4848484884 484 84 84 8 48 8448 4 84 4 4 848 4 8484 84 48 84 84 84 84 84 84 8 8 8 48 48 84 84 8484884 8 48 48 48 48 4 88 4 848 48 4 84 84 848 48 48 48 4 848 48 48 48 48 4 848 48 4 488 4 848 8 4 8484488 48 48 4 848 4 848 48 48 48 48 48 48 4 848 4 84 848 484 84
From Fred

Harmony sighed. This was getting crazy. But now she understood what Fred was trying to say.
It was a code language he had used before. Harmony knew that 8 meant "n" and 4 meant "o"
So he basically was saying no nono on o o on ono non o no again and again.
But Harmony was not happy. She liked this school and it was her choice. What did his opinion matter? And then she threw the paper in the bin.