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