Graph Nodes:
X1;X2;X3;X4;X5;X6;X7;X8;X9;X10;X11;X12;X13;X14;X15;X16;X17;X18;X19;X20;X21;X22;X23;X24;X25;X26;X27

Graph Edges:
1. X2 --> X1
2. X2 --> X3
3. X2 --> X4
4. X2 --> X13
5. X2 --> X14
6. X2 --> X23
7. X3 --> X1
8. X3 --> X4
9. X3 --> X5
10. X3 --> X9
11. X3 --> X18
12. X3 --> X19
13. X3 --> X22
14. X4 --> X5
15. X4 --> X9
16. X4 --> X10
17. X4 --> X14
18. X4 --> X18
19. X4 --> X19
20. X4 --> X27
21. X5 --> X7
22. X5 --> X12
23. X5 --> X17
24. X5 --> X25
25. X6 --> X15
26. X7 --> X6
27. X7 --> X21
28. X7 --> X24
29. X8 --> X6
30. X8 --> X21
31. X8 --> X23
32. X8 --> X26
33. X9 --> X7
34. X9 --> X12
35. X9 --> X17
36. X9 --> X25
37. X10 --> X8
38. X11 --> X8
39. X11 --> X17
40. X12 --> X8
41. X13 --> X10
42. X13 --> X27
43. X14 --> X13
44. X15 --> X20
45. X16 --> X15
46. X17 --> X15
47. X17 --> X16
48. X18 --> X16
49. X19 --> X16
50. X21 --> X20
51. X24 --> X23
52. X25 --> X24
