1
0
1
0
1
0
1
0
1
0
1
1
1
2
1
0
1
1
1
1
1
0
1
0
1
0
1
2
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
4
1
3
1
0
1
0
1
6
1
4