harry potter and me photos

[laoisecronin]

No: HPFGUIDX 34379

 I was looking at the photos from the JKR interview harry potter and 
me and wanted to know everybody elses thoughts on the class lists.In 
the interview JKR said that she had a list of all the students in 
harry's year and how magical they were.The list has their names  
followed by some symbols and letters. There is either a circle or 
square depending on if thay are a boy or a girl and a G, S, R, or H 
for their house. But i don't know what the other symbols represent , 
there is a star,a star with a circle around it and an N with a square 
around it.They could represent whether they are mugggle born,half 
blood or pure blood. Or they could represent how strong they are at 
magic or maybe their importance in the stories.Any other ideas?. 
Maybe everyone else see straight away what they mean but i've got a 
mental block about it or something:) 
 (VERY infrequent poster hoping no one will hate her for her 
stupidity) 
   Laoise