How many Harry Potters books are there?
7
3
5
4
3
5
4
3
5
4
3
5
4
3
5
4
3
2
5
4
3
2
5
4
7
3
2
5
4
7
3
6
2
5
4
7
3
6
2
5
4
7
3
6
2
5
4
7
3
6
2
5
4
7
3
1
6
2
5
4
7
3
1
8
6
2
5
4
7
3
1
8
6
2
5
4
7
3
1
8
6
2
5
4
7
3
1
8
6
2
5
9
0
4
7
3
1
8
6
2
5
9
4
7
0
3
1
8
10
6
2
5
9
4
7
3
1
8
10
6
2
5
9
4
7
1
8
10
6
2
9
7
1
8
10
6
2
11
12
9
7
1
13
8
10
6
2
11
12
9
7
1
13
8
10
6
2
11
12
9
7
1
13
8
10
6
2
11
12
9
7
16
1
13
8
10
6
11
12
9
7
16
1
13
8
10
6
11
12
9
16
1
66
66
62
132
256
108
168
114
62