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 Scala (judge verdict: Accepted)

object Main extends App {
  while (true) {
    val n = scala.io.StdIn.readLine.toString.toCharArray.map(_.asDigit).sum
    if (n == 0) sys.exit
    println(n)
  }
}