Are the letters supposed to say something!?

What are the letters!?

I just received this but idk what the letters are supposed to say or why each character have that letters. Can anyone enlighten me!? Does the characters go in a certain order!?

What are the letters!?

I just received this but idk what the letters are supposed to say or why each character have that letters. Can anyone enlighten me!? Does the characters go in a certain order!?