=== step 0 ===
.111.2.2
..221...
..22..2.
.21.22..
..2122..
2..112.1
.11.....
..1122.2
=== step 1 ===
.1......
.....22.
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.1......
.1112...
=== step 2 ===
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.1.112..
.111....
=== step 3 ===
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.1.11...
.1.1....
=== step 4 ===
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=== step 5 ===
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=== step 6 ===
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=== step 7 ===
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=== step 8 ===
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=== step 9 ===
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=== step 10 ===
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