200
300
x
400
x
x |
+
+
+
+
+
+ |
x
x
700
x
500
900 |
=
=
=
=
=
= |
1000
1000
1000
1000
1000
1000 |
|
x
x
x
x
x
x |
=
=
=
=
=
= |
.....
.....
.....
.....
.....
..... |
|
200
300
x
400
x
x |
+
+
+
+
+
+ |
x
x
700
x
500
900 |
=
=
=
=
=
= |
1000
1000
1000
1000
1000
1000 |
|
x
x
x
x
x
x |
=
=
=
=
=
= |
.....
.....
.....
.....
.....
..... |
|