n1, n2 = input(), input()
max_len = max(len(n1), len(n2))
if len(n1) < max_len:
    n1 = "0" * (max_len - len(n1)) + n1

if len(n2) < max_len:
    n2 = "0" * (max_len - len(n2)) + n2

res = ""
for i in range(max_len - 1, -1, -1):
    res = str((int(n1[i]) + int(n2[i])) % 10) + res

print(res)