test 1 failed: expected "12\n1 1 1 2\n1 2 3 2\n2 1 2 1\n2 2 2 2\n3 1 1 1\n3 2 1 2\n1 2 1 1\n3 2 1 2\n2 1 2 1\n2 2 2 2\n1 1 3 1\n1 2 3 2\n" got "10\n1 1 1 2\n3 1 1 1\n3 2 1 2\n2 1 1 1\n2 2 1 2\n1 2 1 1\n1 1 2 1\n1 2 2 2\n1 1 3 1\n1 2 3 2"