=== step 0 ===
........
..1.....
...1....
.111....
........
........
........
........
=== step 1 ===
........
........
.1.1....
..11....
..1.....
........
........
........
=== step 2 ===
........
........
...1....
.1.1....
..11....
........
........
........
=== step 3 ===
........
........
..1.....
...11...
..11....
........
........
........
=== step 4 ===
........
........
...1....
....1...
..111...
........
........
........
=== step 5 ===
........
........
........
..1.1...
...11...
...1....
........
........
=== step 6 ===
........
........
........
....1...
..1.1...
...11...
........
........
=== step 7 ===
........
........
........
...1....
....11..
...11...
........
........
=== step 8 ===
........
........
........
....1...
.....1..
...111..
........
........
=== step 9 ===
........
........
........
........
...1.1..
....11..
....1...
........
=== step 10 ===
........
........
........
........
.....1..
...1.1..
....11..
........
