How many countries in South America are landlocked?
2
2
5
3
2
5
3
2
1
5
3
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
7
5
3
4
2
1
7
5
3
4
2
1
7
5
3
4
2
1
7
5
3
9
4
2
1
6
7
5
3
9
8
4
2
1
6
7
5
3
9
8
4
2
1
6
7
5
3
9
8
4
2
1
6
7
5
3
9
8
4
2
1
6
7
5
3
9
8
4
2
1
10
6
7
5
3
9
8
4
2
1
10
6
7
5
3
9
8
4
2
1
10
6
7
5
3
13
9
8
4
1
10
6
7
13
9
8
4
1
10
6
7
13
9
8
4
10
6
11
7
13
9
8
4
10
6
11
7
13
9
8
10
6
11
7
13
9
8
10
6
11
7
13
9
8
10
6
11
7
13
9
8
12
14
10
6
11
7
13
9
8
12
14
4 countries