four_digits.dot

digraph g {
 rankdir=LR

0    [label="!NULL"]
1    [label="!NULL"]
2    [label="SENT-START"]
3    [label="zero"]
4    [label="!NULL"]
5    [label="one"]
6    [label="two"]
7    [label="three"]
8    [label="four"]
9    [label="five"]
10   [label="six"]
11   [label="seven"]
12   [label="eight"]
13   [label="nine"]
14   [label="zero"]
15   [label="!NULL"]
16   [label="one"]
17   [label="two"]
18   [label="three"]
19   [label="four"]
20   [label="five"]
21   [label="six"]
22   [label="seven"]
23   [label="eight"]
24   [label="nine"]
25   [label="zero"]
26   [label="!NULL"]
27   [label="one"]
28   [label="two"]
29   [label="three"]
30   [label="four"]
31   [label="five"]
32   [label="six"]
33   [label="seven"]
34   [label="eight"]
35   [label="nine"]
36   [label="zero"]
37   [label="!NULL"]
38   [label="one"]
39   [label="two"]
40   [label="three"]
41   [label="four"]
42   [label="five"]
43   [label="six"]
44   [label="seven"]
45   [label="eight"]
46   [label="nine"]
47   [label="SENT-END"]
     47   ->1    
     0    ->2    
     2    ->3    
     3    ->4    
     5    ->4    
     6    ->4    
     7    ->4    
     8    ->4    
     9    ->4    
     10   ->4    
    11   ->4    
    12   ->4    
    13   ->4    
    2    ->5    
    2    ->6    
    2    ->7    
    2    ->8    
    2    ->9    
    2    ->10   
    2    ->11   
    2    ->12   
    2    ->13   
    4    ->14   
    14   ->15   
    16   ->15   
    17   ->15   
    18   ->15   
    19   ->15   
    20   ->15   
    21   ->15   
    22   ->15   
    23   ->15   
    24   ->15   
    4    ->16   
    4    ->17   
    4    ->18   
    4    ->19   
    4    ->20   
    4    ->21   
    4    ->22   
    4    ->23   
    4    ->24   
    15   ->25   
    25   ->26   
    27   ->26   
    28   ->26   
    29   ->26   
    30   ->26   
    31   ->26   
    32   ->26   
    33   ->26   
    34   ->26   
    35   ->26   
    15   ->27   
    15   ->28   
    15   ->29   
    15   ->30   
    15   ->31   
    15   ->32   
    15   ->33   
    15   ->34   
    15   ->35   
    26   ->36   
    36   ->37   
    38   ->37   
    39   ->37   
    40   ->37   
    41   ->37   
    42   ->37   
    43   ->37   
    44   ->37   
    45   ->37   
    46   ->37   
    26   ->38   
    26   ->39   
    26   ->40   
    26   ->41   
    26   ->42   
    26   ->43   
    26   ->44   
    26   ->45   
    26   ->46   
    37   ->47   
}