10
532..
.4...
.1...
.6...
.....

.24..
36...
.1...
.5...
.....

.41..
.5...
36...
2....
.....

.2...
.41..
.5...
63...
.....

4....
6152.
..3..
.....
.....

5....
2413.
..6..
.....
.....

364..
..512
.....
.....
.....

.4...
5123.
.6...
.....
.....

.32..
54...
.1...
.6...
.....

53...
.621.
...4.
.....
.....