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(mclheader
mcltype matrix
dimensions 20x20
)
(mclmatrix
begin
0     1 $
1     0  2 12 $
2     1  5  6 $
3     9 10 11 14 $
4     5 12 15 16 $
5     2  4 12 15 16 $
6     2  7 13 16 18 $
7     6  8 17 18 19 $
8     7 18 19 $
9     3 10 14 $
10    3  9 14 $
11    3 12 14 $
12    1  4  5 11 15 16 $
13    6 16 17 18 $
14    3  9 10 11 $
15    4  5 12 16 $
16    4  5  6 12 13 15 17 $
17    7 13 16 18 $
18    6  7  8 13 17 19 $
19    7  8 18 $
)