
| Period | Class |
| 1 | P.E. (3,6) |
| 2 | P.E. (1,5), (3,6) |
| 3 | P.E. (1,5) |
| 4 | P.E. (1,3) |
| 5 | P.E. (2,4) |
| 6 | P.E. (2,4) |
| 7 | P.E. (2,4) |
| 8 | P.E. (2,4) |