11111111111111111111111111111111
1..............................1
1..............................1
1..............................1
1..............................1
1.......11111......11111.......1
1.......1..............1.......1
1.......1..............1.......1
1.......1..............1.......1
1.......1..............1.......1
1..............................1
1..............11..............1
1..............11..............1
1..............................1
1..............................1
1.......1..............1.......1
1.......1..............1.......1
1.......1..............1.......1
1.......1..............1.......1
1.......11111......11111.......1
1...P..........................1
1..............................1
1..............................1
11111111111111111111111111111111