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)

nums=[]
while true
    l=gets.chop.split("").map(&:to_i)
    if l[0]==0
        break
    else
        nums<<l
    end
end
nums.each do |n|
    p n.inject{|a,b|a+b}
end