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 = []
b = []
while true do
    x = gets.to_i
    break if x == 0
    a << x.to_s
end

for i in 0...a.length do
    b << a[i].split("").map(&:to_i).inject(:+)
end

puts b