=== step 0 ===
.2....
.1.2.1
....2.
...211
..212.
..1.21
=== step 1 ===
..2...
..2.2.
..2...
..2..1
..2...
..1.21
=== step 2 ===
...2..
.22...
.22...
.222..
.22.21
...2..
=== step 3 ===
..2...
.2.2..
2.....
2...2.
.2..2.
..222.
=== step 4 ===
..2...
.22...
22....
22....
.22.22
..222.
=== step 5 ===
.22...
2.2...
......
......
2...22
.22.22
=== step 6 ===
.22...
..2...
......
......
.2.222
.2.222
=== step 7 ===
.22...
.22...
......
....2.
...2.2
...2.2
=== step 8 ===
.22...
.22...
......
....2.
...2.2
......
=== step 9 ===
.22...
.22...
......
....2.
....2.
......
=== step 10 ===
.22...
.22...
......
......
......
......