x=0
nums = []
while True:
for j in input():
nums += [j]
for i in nums:
x += i
if x == 0:
print(x)
breakfor i in nums:
i = int(i)
x += iint(i) for i in nums:
x += ifor i in nums:
x += int(i)for i in nums:
x += [i]