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