n
u
m
b
e
r
1
0
0
s
i
n
g
l
e
d
o
u
b
l
e
1
0
0
!
=
9
3
3
2
6
2
1
5
4
4
3
9
4
4
1
5
2
6
8
1
6
9
9
2
3
8
8
5
6
2
6
6
7
0
0
4
9
0
7
1
5
9
6
8
2
6
4
3
8
1
6
2
1
4
6
8
5
9
2
9
6
3
8
9
5
2
1
7
5
9
9
9
9
3
2
2
9
9
1
5
6
0
8
9
4
1
4
6
3
9
7
6
1
5
6
5
1
8
2
8
6
2
5
3
6
9
7
9
2
0
8
2
7
2
2
3
7
5
8
2
5
1
1
8
5
2
1
0
9
1
6
8
6
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0