3,three 1,one 2,two 2 3 4 5 6 10 11 12 13 14 [ 1, 6, 11, 1 ] [ 2, 7, 12, 1 ] [ 3, 8, 13, 1 ] [ 4, 9, 14, 1 ] [ 5, 10, 15, 1 ]