1	
2
3
4
5
6	9-9+7-1
7
8	9-9+7+1
9
10	9+9-7-1
11
12	9+9-7+1
13	
14
15
16
17
18
19
20
21
22
23	
24	9+9+7-1
25
26	1+9+9+7