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Easy
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7
8
1
2
5
7
8
9
2
7
8
9
1
2
5
3
5
7
8
1
3
5
8
1
5
7
8
1
7
8
1
1
7
8
7
5
7
8
4
7
8
5
7
8
5
6
8
1
4
9
5
9
1
2
4
1
2
3
6
9
2
3
9
2
3
5
8
1
3
4
5
8
1
4
5
8
1
2
4
1
2
3
9
2
3
9
1
2
2
3
5
1
4
5
7
1
2
7
1
1
4
7
9
7
9
1
4
6
7
2
5
6
7
8
2
4
7
8
2
4
5
6
5
7
8
9
4
5
6
8
3
7
4
6
7
3
5
6
7
8
3
4
7
8
4
5
6
8
4
5
6
7
8
4
7
9
3
6
7
4
6
7
9
4
6
7
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