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)

a=Array.new()
loop do
   x=gets.to_s
   if x.to_i==0 then break end
   total=0
   for i in 0..x.length-1 do
       total=total+x[i].to_i
   end
   a.push(total)
end

a.each do |e|
  puts e
end