test_a_1
 1  0.0  1
 2  2.0  3
 2  3.0  3
 3  7.0  4
 4  4.0  2
 5  9.0  2
 6  5.0  3
 7    _  _
 8  8.0  2
 9  1.0  6

test_a_2
 9  1.0  6
 2  2.0  3
 2  3.0  3
 4  4.0  2
 6  5.0  3
 _  6.0  _
 3  7.0  4
 8  8.0  2
 5  9.0  2

test_a_3
 1  0.0  1
 4  4.0  2
 5  9.0  2
 8  8.0  2
 2  2.0  3
 2  3.0  3
 6  5.0  3
 3  7.0  4
 _    _  5
 9  1.0  6
 _    _  7
 _    _  8
 _    _  9

test_a_1_2
 1  1.0  _
 1  2.0  _
 1  3.0  _
 1  4.0  _
 1  5.0  _
 1  6.0  _
 1  7.0  _
 1  8.0  _
 1  9.0  _
 2  1.0  _
 2  2.0  3
 2  3.0  3
 2  4.0  _
 2  5.0  _
 2  6.0  _
 2  7.0  _
 2  8.0  _
 2  9.0  _
 3  1.0  _
 3  2.0  _
 3  3.0  _
 3  4.0  _
 3  5.0  _
 3  6.0  _
 3  7.0  4
 3  8.0  _
 3  9.0  _
 4  1.0  _
 4  2.0  _
 4  3.0  _
 4  4.0  2
 4  5.0  _
 4  6.0  _
 4  7.0  _
 4  8.0  _
 4  9.0  _
 5  1.0  _
 5  2.0  _
 5  3.0  _
 5  4.0  _
 5  5.0  _
 5  6.0  _
 5  7.0  _
 5  8.0  _
 5  9.0  2
 6  1.0  _
 6  2.0  _
 6  3.0  _
 6  4.0  _
 6  5.0  3
 6  6.0  _
 6  7.0  _
 6  8.0  _
 6  9.0  _
 7  1.0  _
 7  2.0  _
 7  3.0  _
 7  4.0  _
 7  5.0  _
 7  6.0  _
 7  7.0  _
 7  8.0  _
 7  9.0  _
 8  1.0  _
 8  2.0  _
 8  3.0  _
 8  4.0  _
 8  5.0  _
 8  6.0  _
 8  7.0  _
 8  8.0  2
 8  9.0  _
 9  1.0  6
 9  2.0  _
 9  3.0  _
 9  4.0  _
 9  5.0  _
 9  6.0  _
 9  7.0  _
 9  8.0  _
 9  9.0  _

test_a_1_3
 1  0.0  1
 1    _  2
 1    _  3
 1    _  4
 1    _  5
 1    _  6
 1    _  7
 1    _  8
 1    _  9
 2    _  1
 2    _  2
 2  2.0  3
 2  3.0  3
 2    _  4
 2    _  5
 2    _  6
 2    _  7
 2    _  8
 2    _  9
 3    _  1
 3    _  2
 3    _  3
 3  7.0  4
 3    _  5
 3    _  6
 3    _  7
 3    _  8
 3    _  9
 4    _  1
 4  4.0  2
 4    _  3
 4    _  4
 4    _  5
 4    _  6
 4    _  7
 4    _  8
 4    _  9
 5    _  1
 5  9.0  2
 5    _  3
 5    _  4
 5    _  5
 5    _  6
 5    _  7
 5    _  8
 5    _  9
 6    _  1
 6    _  2
 6  5.0  3
 6    _  4
 6    _  5
 6    _  6
 6    _  7
 6    _  8
 6    _  9
 7    _  1
 7    _  2
 7    _  3
 7    _  4
 7    _  5
 7    _  6
 7    _  7
 7    _  8
 7    _  9
 8    _  1
 8  8.0  2
 8    _  3
 8    _  4
 8    _  5
 8    _  6
 8    _  7
 8    _  8
 8    _  9
 9    _  1
 9    _  2
 9    _  3
 9    _  4
 9    _  5
 9  1.0  6
 9    _  7
 9    _  8
 9    _  9

test_a_2_3
 _  1.0  1
 _  1.0  2
 _  1.0  3
 _  1.0  4
 _  1.0  5
 9  1.0  6
 _  1.0  7
 _  1.0  8
 _  1.0  9
 _  2.0  1
 _  2.0  2
 2  2.0  3
 _  2.0  4
 _  2.0  5
 _  2.0  6
 _  2.0  7
 _  2.0  8
 _  2.0  9
 _  3.0  1
 _  3.0  2
 2  3.0  3
 _  3.0  4
 _  3.0  5
 _  3.0  6
 _  3.0  7
 _  3.0  8
 _  3.0  9
 _  4.0  1
 4  4.0  2
 _  4.0  3
 _  4.0  4
 _  4.0  5
 _  4.0  6
 _  4.0  7
 _  4.0  8
 _  4.0  9
 _  5.0  1
 _  5.0  2
 6  5.0  3
 _  5.0  4
 _  5.0  5
 _  5.0  6
 _  5.0  7
 _  5.0  8
 _  5.0  9
 _  6.0  1
 _  6.0  2
 _  6.0  3
 _  6.0  4
 _  6.0  5
 _  6.0  6
 _  6.0  7
 _  6.0  8
 _  6.0  9
 _  7.0  1
 _  7.0  2
 _  7.0  3
 3  7.0  4
 _  7.0  5
 _  7.0  6
 _  7.0  7
 _  7.0  8
 _  7.0  9
 _  8.0  1
 8  8.0  2
 _  8.0  3
 _  8.0  4
 _  8.0  5
 _  8.0  6
 _  8.0  7
 _  8.0  8
 _  8.0  9
 _  9.0  1
 5  9.0  2
 _  9.0  3
 _  9.0  4
 _  9.0  5
 _  9.0  6
 _  9.0  7
 _  9.0  8
 _  9.0  9

test_a_1_2_3
 2  2.0  3
 2  3.0  3
 3  7.0  4
 4  4.0  2
 5  9.0  2
 6  5.0  3
 8  8.0  2
 9  1.0  6