|   n  |       a1  |       a2  |       a3  |       a4  |       a5  |       b6  |       b7  |       b8  |       c9  |       c10  |       d11  |       e12  |    
|   a1  |       0  |       4  |       3  |       23  |       9  |       21  |       25  |       22  |       2  |       5  |       18  |       2  |    
|   a2  |       8  |       0  |       17  |       20  |       10  |       20  |       17  |       16  |       1  |       3  |       16  |       1  |    
|   a3  |       18  |       26  |       0  |       26  |       17  |       25  |       24  |       24  |       3  |       4  |       15  |       4  |    
|   a4  |       18  |       15  |       19  |       0  |       13  |       21  |       24  |       19  |       11  |       14  |       22  |       7  |    
|   a5  |       20  |       17  |       14  |       23  |       0  |       18  |       29  |       2  |       16  |       18  |       21  |       4  |    
|   b6  |       16  |       13  |       15  |       17  |       13  |       0  |       26  |       23  |       11  |       19  |       15  |       1  |    
|   b7  |       19  |       24  |       17  |       24  |       13  |       25  |       0  |       20  |       14  |       16  |       23  |       8  |    
|   b8  |       20.5  |       24  |       20  |       24  |       16  |       24  |       23  |       0  |       22  |       24  |       15  |       5  |    
|   c9  |       25  |       21  |       20  |       22  |       17  |       21  |       26  |       28  |       0  |       25  |       20  |       10  |    
|   c10  |       21  |       19.5  |       19  |       24  |       15  |       22  |       31  |       22  |       26  |       0  |       19  |       5  |    
|   d11  |       20  |       14  |       13  |       22  |       17  |       18  |       22  |       12  |       18  |       20  |       0  |       36  |    
|   e12  |       8  |       8  |       7  |       24.5  |       9  |       11  |       30  |       18  |       17  |       15  |       21  |       0  |