i
t
e
r
a
t
i
o
n
s
t
e
p
0
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
2
3
4
5
2
4
6
8
x
g
3
(
x
)
I
t
e
r
a
t
i
o
n
=
0
x
_
n
=
5
.
g
(
x
_
n
)
=
0
.
7
7
4
5
9
7
