How many houses are there in the Harry Potter books?
4
3
3
4
3
4
3
4
3
4
3
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
5
4
2
3
6
5
4
2
3
6
5
4
2
3
6
5
4
2
3
7
6
5
4
2
3
7
6
5
4
2
3
7
6
5
4
2
3
7
6
5
4
2
3
7
6
5
4
1
2
3
7
6
5
4
1
2
7
6
8
5
4
1
2
7
6
8
5
1
2
7
6
8
5
1
2
7
6
8
5
1
2
7
6
8
5
0
1
2
7
6
8
1
7
6
8
9
1
7
6
8
9
1
10
7
6
8
9
1
10
7
6
8
9
1
10
7
6
8
9
11
1
10
7
8
9
11
1
10
13
7
12
8
9
11
1
10
13
7
12
8
9
11
1
10
13
12
8
9
11
1
10
13
12
8
9
16
11
1
10
13
12
8
9
16
256
512
132
144
108
4 houses