1
2b
3c
1
2
3
1
2
3
1
2
3
1
2
3v
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
2x
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3aa