k
0
1
k
0
1
k
0
1
k
0
1
k
0
1
k
0
1
k
0
1
k
0
1
k
0
1
k
0
3
k
0
2
k
0
1
k
0
1
k
0
1
k
0
1
k
0
2
k
0
1
k
0
1
k
0
10