1 array 2 2
2 var 2
3 var 2
4 var 2
5 var 2
6 var 2
7 read 2 1 2
8 read 2 1 3
9 read 2 1 4
10 read 2 1 5
11 read 2 1 6
12 ne 1 7 8
13 ne 1 7 9
14 ne 1 7 10
15 ne 1 7 11
16 ne 1 8 9
17 ne 1 8 10
18 ne 1 8 11
19 ne 1 9 10
20 ne 1 9 11
21 ne 1 10 11
22 and 1 12 13
23 and 1 22 14
24 and 1 23 15
25 and 1 24 16
26 and 1 25 17
27 and 1 26 18
28 and 1 27 19
29 and 1 28 20
30 and 1 29 21
31 root 1 30