4           
3  GGGGGGGGG
5           
2 GGGGGGGGG 
1 GGGGGGGGGG
T GGGGGGGGGG
28
10 9 8 7 6 5 4 3 2 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10