C:\test>junk [ [1], [2, 3], [4, 5, 6], [7, 8, 9, 10] ] [ [1, 2, 4, 7], [2, 3, 5, 8], [4, 5, 6, 9], [7, 8, 9, 10] ] [ [ 1], [ 2, 3], [ 4, 5, 6], [ 7, 8, 9, 10], [11, 12, 13, 14, 15] ] [ [ 1, 2, 4, 7, 11], [ 2, 3, 5, 8, 12], [ 4, 5, 6, 9, 13], [ 7, 8, 9, 10, 14], [11, 12, 13, 14, 15] ]