Write a program which reads an integer and prints sum of its digits.



Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Example

Input

123
55
1000
0


Output

6
10
1
data = []
while True:
    in_line = raw_input()
    if int(in_line) == 0:
        break
    sum = 0
    for s in in_line:
        sum += int(s)
    data.append(sum)
for d in data:
    print d