1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 0 - = 1 2 3 4 5 6 7 8 9 0 - = 1 2 3 4 5 6 7 8 9 0 1 2 2 3 43 4 5 5 6 6 7 7 8 8 9 9 0 0 87 6 6 5 44 3 3 2 2