cond
0
0
!=
0
0
=
0
0
=
start
0
1
sub
stop
cond
0
0
=
0
0
!=
0
0
=
start
0
2
sub
stop
cond
0
0
=
0
0
=
0
0
!=
start
0
3
sub
stop
cond
0
0
=
0
0
=
0
0
=
start
0
4
sub
stop
end