2 x 1
2 x 2
2 x 3
2 x 4
2 x 5
2 x 6
2 x 7
2 x 8- 2 x 9
2 x 10- 2 x 11
2 x 12
2 x 13
2 x 14
2 x 15
2 x 16- 2 x 17
2 x 18
2 x 19
2 x 20
2 x 21
2 x 22
2 x 23
2 x 24- 2 x 25
- 2 x 26
- 2 x 27
- 2 x 28
- 2 x 29
- 2 x 30
- 2 x 31
- 2 x 32
- 2 x 33
- 2 x 34
- 2 x 35
- 2 x 36
- 2 x 37
- 2 x 38
2 x 39- 2 x 40