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
# coding: UTF-8
num_list = []
while(1):
    num = [map(int,raw_input())]
    if num[0][0] == 0:
        break
    num_list.extend(num)
for i in range(len(num_list)):
    print sum(num_list[i])
