How many US presidents did not have a wife?
1
1
1
1
1
1
1
1
1
2
1
2
1
2
1
2
1
2
1
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
5
2
3
1
4
5
2
3
1
4
0
5
2
3
1
4
5
2
3
0
4
5
2
3
0
4
5
2
3
4
0
5
2
3
4
5
2
3
0
4
5
2
3
4
5
2
3
4
6
5
2
3
4
6
5
3
4
6
5
3
4
6
5
3
7
4
6
5
3
7
One
4
6
5
3
7
One
4
6
5
7
One
6
5
7
One
8
6
5
9
7
One
8
11
6
5
9
7
One
8
11
6
9
7
One
8
11
6
9
7
One
8
11
6
9
7
One
8
11
6
9
7
One
8
11
10
6
9
7
One
8
11
10
6
9
7
One
13
8
11
10
6
9
7
One
13
8
11
10
6
12
9
7
One
13
8
11
10
ONE
ONE
ONE
ONE
ONE
One.
One.