data/advent15a.txt

   1 Sensor at x=2, y=18: closest beacon is at x=-2, y=15
   2 Sensor at x=9, y=16: closest beacon is at x=10, y=16
   3 Sensor at x=13, y=2: closest beacon is at x=15, y=3
   4 Sensor at x=12, y=14: closest beacon is at x=10, y=16
   5 Sensor at x=10, y=20: closest beacon is at x=10, y=16
   6 Sensor at x=14, y=17: closest beacon is at x=10, y=16
   7 Sensor at x=8, y=7: closest beacon is at x=2, y=10
   8 Sensor at x=2, y=0: closest beacon is at x=2, y=10
   9 Sensor at x=0, y=11: closest beacon is at x=2, y=10
  10 Sensor at x=20, y=14: closest beacon is at x=25, y=17
  11 Sensor at x=17, y=20: closest beacon is at x=21, y=22
  12 Sensor at x=16, y=7: closest beacon is at x=15, y=3
  13 Sensor at x=14, y=3: closest beacon is at x=15, y=3
  14 Sensor at x=20, y=1: closest beacon is at x=15, y=3