digit_loop.dot

digraph g {
 rankdir=LR

0    [label="!NULL"]
1    [label="!NULL"]
2    [label="SENT-START"]
3    [label="SIL"]
4    [label="zero"]
5    [label="!NULL"]
6    [label="one"]
7    [label="two"]
8    [label="three"]
9    [label="four"]
10   [label="five"]
11   [label="six"]
12   [label="seven"]
13   [label="eight"]
14   [label="nine"]
15   [label="SENT-END"]
     15   ->1    
     0    ->2    
     5    ->3    
     2    ->4    
     3    ->4    
     5    ->4    
     4    ->5    
     6    ->5    
     7    ->5    
     8    ->5    
    9    ->5    
    10   ->5    
    11   ->5    
    12   ->5    
    13   ->5    
    14   ->5    
    2    ->6    
    3    ->6    
    5    ->6    
    2    ->7    
    3    ->7    
    5    ->7    
    2    ->8    
    3    ->8    
    5    ->8    
    2    ->9    
    3    ->9    
    5    ->9    
    2    ->10   
    3    ->10   
    5    ->10   
    2    ->11   
    3    ->11   
    5    ->11   
    2    ->12   
    3    ->12   
    5    ->12   
    2    ->13   
    3    ->13   
    5    ->13   
    2    ->14   
    3    ->14   
    5    ->14   
    3    ->15   
    5    ->15   
}