{0} {0, 4} {0, 4, 9} {0, 4, 9, 8} {0, 4, 9, 8, 7} {0, 4, 9, 8, 7, 6} {0, 4, 9, 8, 7, 6, 5} {0, 4, 9, 8, 7, 6, 5, 2} {0, 4, 9, 8, 7, 6, 5, 2, 3} 0 5 12 16 8 11 15 25 25 15