16 21 4
+++++++++++++++++++++
+                   +
+         SSSSS     +
+    S   S          +
+    S    SS        +
+    S      S       +
+ S  S       SS     +
+  SS  S            +
+     S             +
+    S  SSSSSS      +
+   S         S     +
+  S           S    +
+ S     SSS   S     +
+      S     S      +
+       SSSSS       +
+++++++++++++++++++++