DATA FILE EXAMPLE

40              // block number = 40
30 40           // block width = 30, block height = 40
57 42
57 42
33 44
33 44
57 42
57 42
58 43
58 43
39 29
39 29
55 41
54 40
35 46
36 48
50 66
50 66
42 31
47 35
34 25
48 36
22 16
32 24
27 20
48 36
30 40
20 26
36 48
43 57
33 44
52 69
42 56
48 36
33 44
29 38
28 37
28 37
53 39
23 17
55 73
             
1                 // common centroid group number = 1
3 6               // subgroup number in this common centroid group = 3, total block number in this common centroid group = 6
2                 // number of block in this subgroup = 2
5 6               // block 5 and block 6 belong to this subgroup
2 
7 8 
2 
9 10 

1                 // symmetry group number = 1 
1 2               // self symmetry block number = 1, symmetry pair number = 2
0                 // block 0 is a self symmetry block
1 2               // block 1 and block 2 are a symmetry pair
3 4               // block 3 and block 4 are also a symmetry pair

4                 // number of general constraints 
align(b,38,39)    
align(b,37,38) 
align(b,36,37) 
align(b,35,36) 

