This change ensures that the visibility option is applied only once.
|  |  | ||
| 4 |  | 4 |  | 
| 5 |  | 5 |  | 
| 6 |  | 6 |  | 
|  | 7 |  | |
| 7 |  | 8 |  | 
| 8 |  | 9 |  | 
| 9 |  | 10 |  | 
| 10 |  | 11 |  | 
| 11 |  | 12 |  | 
|  | 13 |  | |
|  | 14 |  | |
|  | 15 |  | |
|  | 16 |  | |
|  | 17 |  | |
|  | 18 |  | |
|  | 19 |  | |
|  | 20 |  | |
|  | 21 |  | |
|  | 22 |  | |
| 12 |  | 23 |  | 
| 13 |  | 24 |  | 
| 14 |  | 25 |  | 
|  |  | ||
| 21 |  | 32 |  | 
| 22 |  | 33 |  | 
| 23 |  | 34 |  | 
| 24 |  |  | |
|  | 35 |  | |
| 25 |  | 36 |  | 
| 26 |  | 37 |  | 
| 27 |  | 38 |  | 
|  |  | ||
| 68 |  | 68 |  | 
| 69 |  | 69 |  | 
| 70 |  | 70 |  | 
|  | 71 |  | |
|  | 72 |  | |
|  | 73 |  | |
| 71 |  | 74 |  | 
| 72 |  | 75 |  | 
| 73 |  | 76 |  |