2000
0, 7831, 6506, 0, 0, 0.0, 0.0
1, 7831, 6506, 20, 20, 0.255395224109, 0.307408545958
2, 7831, 6506, 0, 0, 0.0, 0.0
3, 7831, 6507, 40, 40, 0.510790448219, 0.614722606424