1 array 1 1
2 var 1
4 zero 1
5 one 1
8 write 1 1 1 4 5
9 write 1 1 8 5 5
11 read 1 9 2 
12 read 1 9 11 
13 var 1
14 eq 1 13 12 
15 root 1 14