30
-24 -19 -11 -7
-6 -3 -2 13
6 -8 16 18
-6 -17 5 -8
-16 -28 -13 -4
-17 -27 -1 1
-9 -13 -2 -6
-27 -25 -10 30
-26 -18 9 -15
-1 -23 3 -6
-16 0 5 6
-25 -22 -7 13
-27 -15 -25 0
-30 -8 6 -3
-8 -14 7 25
-30 26 12 27
0 0 16 26
6 -4 9 0
8 -1 27 0
-5 6 10 10
-10 -27 0 -3
-10 -9 17 12
-18 -13 17 29
-17 -30 -12 -8
-9 -20 27 6
-30 -20 26 17
-1 5 4 8
5 5 11 18
-8 -18 4 -11
-14 -24 -13 -12