[10952] A + B -5

lists = []
while True:
    lists2 = list(map(int, input().split()))
    if (lists2[0] == 0 and lists2[1] == 0):
        break
    else:
        lists.append(lists2)

for i in range(len(lists)):
    print(lists[i][0] + lists[i][1])