In a star put diamonds to the edges in such a way that start with any one of the edge with counts 1,2,3.At third position put a diamond,such that filling of diamonds is to be 9 but not 10.
rules: have to come across edges only,not in diagonal.
can't start from one diamond to another,but can go through it,i.e.,if there is a gap in between a row from edge them it's correct.