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: Runtime Error)

object Main extends App {
  val sc = new java.util.Scanner(System.in)
  execute(sc.nextInt())

  def execute(in: Int): Unit = {
    in match {
      case 0 => sc.close()
      case _ =>
        println(in.toString.toList.map(_.toString).map(_.toInt).sum)
        execute(sc.nextInt())
    }
  }
}