How many countries have landed spacecraft on the moon?
3
2
3
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
3
5
1
2
4
11
3
5
1
2
4
11
3
5
1
2
4
7
11
13
3
5
1
2
4
7
11
13
3
5
1
2
4
7
11
13
8
3
5
1
2
4
7
11
13
8
3
5
1
4
7
11
13
8
5
4
7
6
11
13
8
14
10
4
7
6
11
13
8
14
10
4
7
6
11
13
8
14
10
4
9
7
6
11
13
8
14
10
4
9
7
6
11
13
8
14
10
9
7
6
11
13
8
12
14
10
9
7
6
11
13
8
12
14
10
9
7
6
11
13
8
12
14
10
9
7
6
11
13
8
12
14
10
9
7
6
11
13
8
14