Math = 9 1 + 7 3 + 8 1 + 0 3 + 9 1 + 2 3 + 1 1 + 4 3 + 1 1 + 8 3 D1=int(input()) print('Digit 11?') D2=int(input()) print('Digit 12?') D3=int(input()) print('Digit 13?') print('The 1-3-sum is',Math)