5 ominoes placed.
 1 1 1 2 2 2
 0 1 3 0 2 0
 0 1 3 0 2 0
 4 3 3 3 5 0
 4 4 4 0 5 0
 4 0 0 5 5 5

5 ominoes placed.
 1 1 1 2 2 2
 0 1 0 3 2 0
 0 1 0 3 2 0
 0 4 3 3 3 5
 0 4 0 5 5 5
 4 4 4 0 0 5

5 ominoes placed.
 1 1 1 2 2 2
 0 1 0 0 2 0
 0 1 0 3 2 0
 4 3 3 3 5 0
 4 4 4 3 5 0
 4 0 0 5 5 5

5 ominoes placed.
 1 1 1 2 2 2
 0 1 0 0 2 0
 0 1 3 0 2 0
 0 4 3 3 3 5
 0 4 3 5 5 5
 4 4 4 0 0 5

4 ominoes placed.
 1 1 1 2 2 2
 0 1 0 0 2 0
 0 1 0 0 2 0
 3 3 3 4 4 4
 0 3 0 0 4 0
 0 3 0 0 4 0

4 ominoes placed.
 1 1 1 2 2 2
 0 1 0 0 2 0
 0 1 0 0 2 0
 0 3 0 0 4 0
 0 3 0 0 4 0
 3 3 3 4 4 4

4 ominoes placed.
 1 1 1 0 2 0
 0 1 3 0 2 0
 0 1 3 2 2 2
 4 3 3 3 0 0
 4 4 4 0 0 0
 4 0 0 0 0 0

4 ominoes placed.
 1 1 1 0 2 0
 0 1 0 0 2 0
 0 1 3 2 2 2
 0 4 3 3 3 0
 0 4 3 0 0 0
 4 4 4 0 0 0

4 ominoes placed.
 1 1 1 0 0 2
 0 1 3 2 2 2
 0 1 3 3 3 2
 0 0 3 4 4 4
 0 0 0 0 4 0
 0 0 0 0 4 0

4 ominoes placed.
 1 1 1 0 0 2
 0 1 3 2 2 2
 0 1 3 3 3 2
 0 0 3 4 0 0
 0 0 0 4 4 4
 0 0 0 4 0 0

4 ominoes placed.
 1 1 1 0 0 2
 0 1 0 2 2 2
 0 1 3 3 3 2
 4 4 4 3 0 0
 0 4 0 3 0 0
 0 4 0 0 0 0

4 ominoes placed.
 1 1 1 2 0 0
 0 1 3 2 2 2
 0 1 3 2 0 0
 4 3 3 3 0 0
 4 4 4 0 0 0
 4 0 0 0 0 0

4 ominoes placed.
 1 1 1 2 0 0
 0 1 0 2 2 2
 0 1 3 2 0 0
 0 4 3 3 3 0
 0 4 3 0 0 0
 4 4 4 0 0 0

4 ominoes placed.
 1 1 1 2 0 0
 0 1 0 2 2 2
 0 1 0 2 0 0
 3 3 3 4 4 4
 0 3 0 0 4 0
 0 3 0 0 4 0

4 ominoes placed.
 1 1 1 2 0 0
 0 1 0 2 2 2
 0 1 0 2 0 0
 3 3 3 4 0 0
 0 3 0 4 4 4
 0 3 0 4 0 0

4 ominoes placed.
 1 1 1 2 0 0
 0 1 0 2 2 2
 0 1 0 2 0 0
 0 3 0 4 0 0
 0 3 0 4 4 4
 3 3 3 4 0 0

4 ominoes placed.
 1 1 1 0 0 0
 0 1 2 2 2 0
 0 1 3 2 0 0
 0 0 3 2 4 0
 0 3 3 3 4 0
 0 0 0 4 4 4

4 ominoes placed.
 1 1 1 0 0 0
 0 1 2 0 0 0
 0 1 2 2 2 0
 0 3 2 4 4 4
 0 3 0 0 4 0
 3 3 3 0 4 0

4 ominoes placed.
 1 1 1 0 0 0
 0 1 2 0 0 0
 0 1 2 2 2 0
 0 3 2 4 0 0
 0 3 0 4 4 4
 3 3 3 4 0 0

4 ominoes placed.
 1 1 1 0 0 0
 0 1 2 0 0 0
 0 1 2 2 2 0
 3 0 2 4 0 0
 3 3 3 4 4 4
 3 0 0 4 0 0

3 ominoes placed.
 1 1 1 0 0 0
 0 1 2 0 0 0
 0 1 2 2 2 0
 0 0 2 3 3 3
 0 0 0 0 3 0
 0 0 0 0 3 0

3 ominoes placed.
 1 1 1 0 0 0
 0 1 2 0 0 0
 0 1 2 2 2 0
 0 0 2 3 0 0
 0 0 0 3 3 3
 0 0 0 3 0 0

3 ominoes placed.
 0 1 0 0 0 0
 0 1 0 2 0 0
 1 1 1 2 0 0
 0 0 2 2 2 3
 0 0 0 3 3 3
 0 0 0 0 0 3

3 ominoes placed.
 0 1 0 0 0 0
 0 1 0 0 0 0
 1 1 1 2 0 0
 0 2 2 2 3 0
 0 0 0 2 3 0
 0 0 0 3 3 3

3 ominoes placed.
 0 0 1 0 0 0
 1 1 1 2 0 0
 0 0 1 2 0 0
 0 0 2 2 2 3
 0 0 0 3 3 3
 0 0 0 0 0 3

3 ominoes placed.
 0 0 1 0 0 0
 1 1 1 0 0 0
 0 0 1 2 0 0
 0 2 2 2 3 0
 0 0 0 2 3 0
 0 0 0 3 3 3

3 ominoes placed.
 1 0 0 0 0 0
 1 1 1 0 0 0
 1 2 2 2 0 0
 0 0 2 3 3 3
 0 0 2 0 3 0
 0 0 0 0 3 0

3 ominoes placed.
 1 0 0 0 0 0
 1 1 1 0 0 0
 1 2 2 2 0 0
 0 0 2 3 0 0
 0 0 2 3 3 3
 0 0 0 3 0 0

3 ominoes placed.
 0 0 0 1 1 1
 0 0 0 2 1 0
 0 2 2 2 1 0
 3 3 3 2 0 0
 0 3 0 0 0 0
 0 3 0 0 0 0

3 ominoes placed.
 0 0 0 1 1 1
 0 0 0 2 1 0
 0 2 2 2 1 0
 0 0 3 2 0 0
 3 3 3 0 0 0
 0 0 3 0 0 0

3 ominoes placed.
 0 0 0 0 1 0
 0 0 2 0 1 0
 0 0 2 1 1 1
 3 2 2 2 0 0
 3 3 3 0 0 0
 3 0 0 0 0 0

3 ominoes placed.
 0 0 0 0 1 0
 0 0 0 0 1 0
 0 0 2 1 1 1
 0 3 2 2 2 0
 0 3 2 0 0 0
 3 3 3 0 0 0

3 ominoes placed.
 0 0 0 0 0 1
 0 0 0 1 1 1
 0 0 2 2 2 1
 3 3 3 2 0 0
 0 3 0 2 0 0
 0 3 0 0 0 0

3 ominoes placed.
 0 0 0 0 0 1
 0 0 0 1 1 1
 0 0 2 2 2 1
 0 0 3 2 0 0
 3 3 3 2 0 0
 0 0 3 0 0 0

3 ominoes placed.
 0 0 0 1 0 0
 0 0 2 1 1 1
 0 0 2 1 0 0
 3 2 2 2 0 0
 3 3 3 0 0 0
 3 0 0 0 0 0

3 ominoes placed.
 0 0 0 1 0 0
 0 0 0 1 1 1
 0 0 2 1 0 0
 0 3 2 2 2 0
 0 3 2 0 0 0
 3 3 3 0 0 0

Done.  16 solutions found.