(-7 , 3 )
( 5, 6 )
( - 8 , - 2 )
( 6 , - 4 )
( - 3 , 0 )
( 9 , -7 )
( 0 , -5 )
( 0 , 0 )
( - 1 , 6 )
( -5 , -3 )
