dd  gas
19  3.2
 3  2.0
 3  1.6
 0  1.0
 0  0.7
 0  0.7
 8  1.6
11  3.1
27  5.1
46  7.7
38  7.0
34  6.1
16  3.0
 9  2.1
 2  1.3
 1  1.0
 0  1.0
 2  1.0
 3  1.2
18  3.4
32  6.1
34  6.5
40  7.5