1 zero 3 2 var 1 3 var 1 4 var 1 5 ult 1 3 4 6 and 1 2 -5 7 concat 2 -6 -6 8 concat 5 1 7 9 zero 5 10 eq 1 8 9 11 concat 2 -2 -2 12 concat 2 -5 -5 13 const 2 10 14 add 2 -12 -13 15 add 2 -11 14 16 zero 2 17 eq 1 15 16 18 and 1 10 -17 19 root 1 18