some tests, that could help you

1
0 0
anwear:
*


3
0 0
0 5
5 0
answear:
*.....
|.....
|.....
|.....
|.....
*----*


3
0 1
0 5
0 9
answear:
*
|
|
|
*
|
|
|
*
+