1X
2X
+1
3X
4X
X
6
5X
6X
|
+1
3X
6X
5X
X X
X
2X
1X
X
5X
4
1X
X
2X
4X
X
X
3X
4X
6X
10
14
16
20
+1
1
1
2
2
4
3
7
4
11
5
16
6
22
7
29
8
37
9
46
10
56
11
2X
3X
4X
5
5X
6X
7X
8X
X
9X
10X
11X
12X
X
6
+1
1
≥1X
3
≥2X
6
≥3X
10
≥4X
+1
15
≥5X
21
≥1X
X
28
≥2X
36
≥3X
45
≥4X
6
55
≥5X
66
≥6X
x2
X
+1
x2
x2
6
x3
<
<
<
X
<
+1
<
X
<
<
<
X
<
6
<
+1