sq.11 180 B

12345678910111213
  1. .xxxxxxxxxxx
  2. x...........x
  3. x...........x
  4. x...........x
  5. x...........x
  6. x...........x
  7. x...........x
  8. x...........x
  9. x...........x
  10. x...........x
  11. x...........x
  12. x...........x
  13. .xxxxxxxxxxx