+ 11 6 1 7 + 14 4 1 8 + 16 3 1 9 + 11 6 1 7 + 14 4 1 8 + 16 3 1 9 12 + 1 = 13 14 + 0 = 14 10 + 4 = 14 15 + 2 = 17 13 + 2 = 15 12 + 3 = 15 14 + 2 + 2 = 18 16 + 2 11 + 4 + 3 = 17 + 1 + 1 = 10 + 2 + 7 = 18 19 19 16+2 12+4 14+3 15+4 11+3 13+2 14 18 19 16 17 15