Problem:
Sum of Numbers

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.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in Ruby (judge verdict: Accepted)

#!/usr/bin/env ruby

result = [];numbers = []
while true
    numbers = gets.split("").map(&:to_i)
    if numbers[0] == 0 then
        break
    else
        result << numbers.sum
    end
end
puts result