1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 2
0 1
1 2
1 1
0 2
1 1
0 2
1 1
0 2
1 1
0 1

//
1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 2
0 1
1 2
1 1
0 2
1 2
0 1
1 2
1 1
0 2

1 1
0 2
1 1
0 2
1 1
0 2
1 1
0 1
1 1
0 4