array
a
=
(
1
,
2
,
3
,
4
,
5
,
6
)
for
int
i
in
a
.
size
()
-
1
..
0
step
-
1
int
j
=
a
[
i
]
if
(
j
mod
2
)
=
1
let
a
[
i
]
=
nil
/
for
a
.
display
()