15
1 	4.5	3
5.3 	6.1	5.5
3	7.2	2
6	8	10
0.5	10	7
7	12.5	4.5
8.2	13	3
9	15.3	7
10.5	16	2
9	17.5	9
13	19	6
16	20.5	8
17	23	12
20.2	24.1	6
19	25	10