1 var 1 2 var 1 3 and 1 1 2 4 var 1 5 var 2 6 var 1 7 slice 1 3 0 0 8 zero 3 9 cond 3 7 -8 8 10 concat 4 9 3 11 slice 1 10 3 3 12 concat 2 6 11 13 add 2 5 12 14 zero 2 15 eq 1 13 14 16 and 1 4 15 17 and 1 3 16 18 root 1 17