1
1
1
1
1
1
2
2
2
2
2
2
:
0
0
0
0
0
0
2
2
2
2
2
2
:
4
4
4
4
4
4
9
9
9
9
9
9
1
0
1
0
1
0
1
1
0
1
1
1
1
0
0
0
0
0
1
0
1
1
0
0
1
0
1
1
1
1
1
1
1
1
1
0
0
0
1
0
0
0
1
0
1
1
1
1
1
1
0
0
0
1
1
0
1
0
0
0
1
1
0
1
1
1
0
0
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
1
1
1
0
1
1
0
1
0
0
1
1
1
1
0
1
1
1
0
1
1
1
1
0
1
0
1
1
1
0
1
1
1
1
0
0
1
1
0
1
0
1
1
0
1
1
0
0
1
1
1
0
1