sueño vs noni

Nobody in this world would understand the meaning of these words, but I'm certain somebody will get the hint.

There used to be a a guy an a girl who had a relationship going on. To cut the story short, they were in love, and there were codes between them. Sueño and noni was one of them, kind of "sleep and dream" thing.

I cannot tell the secret, unless you understand the code... or at least try to crack it.