?GGGGGGGGG
G
??GGGGGGGG
G
???GGGGGGG
G
????GGGGGG
G
?????GGGGG
G
??????GGGG
G
???????GGG
G
????????GG
G
?????????G
G
??????????
G
10
10 9 8 7 6 5 4 3 2 1