require 'rgl/adjacency'
require 'rgl/implicit'
require 'rgl/dot'
g = RGL::DirectedAdjacencyGraph[
8, 9,
8, 10,
9, 11,
9, 12,
10, 13,
10, 14,
11, 15,
11, 16,
12, 17,
12, 18,
13, 19,
13, 20,
14, 21,
14, 22,
15, 23,
15, 24,
16, 25,
16, 26,
17, 27,
17, 28,
18, 29,
18, 30,
18, 31,
18, 32,
19, 31,
19, 32,
20, 33,
20, 34,
21, 35,
21, 36,
22, 37,
22, 38,
23, 39,
23, 40,
24, 41,
24, 42,
25, 43,
25, 44,
26, 45,
26, 46,
27, 47,
27, 48,
28, 49,
28, 50,
29, 51,
29, 52,
30, 53,
30, 54,
31, 55,
31, 56,
32, 57,
32, 58,
33, 59,
33, 60,
34, 61,
34, 62,
35, 63,
35, 64,
36, 65,
36, 66,
37, 67,
38, 13,
39, 68,
39, 69,
40, 70,
40, 71,
42, 72,
42, 73,
43, 74,
43, 75,
44, 76,
44, 77,
46, 78,
46, 79,
47, 80,
47, 81,
48, 82,
48, 83,
50, 84,
50, 85,
51, 86,
51, 87,
53, 90,
53, 91,
55, 93,
55, 94,
57, 92,
58, 97,
58, 98,
59, 99,
99, 100,
60, 100,
61, 101,
61, 102,
61, 103,
62, 104,
62, 105,
64, 88,
65, 106,
65, 107,
66, 9,
67, 108,
67, 109,
75, 9,
78, 26,
86, 30,
88, 106,
88, 89,
89, 16,
92, 95,
92, 96,
93, 37,
96, 9,
105, 9,
105, 10]
g.dotty