1
Sources
1
2
0
0
1
1
1
2
0
1
0
2
1
1
0
0
1
0
0
1
0
0
0
0
0
1
1
0
2
0
0
0
1
2
1
1
0
1
1
0
1
0
1
0
1
0
1
0
0
