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.

Example

Input

123
55
1000
0


Output

6
10
1
import java.util.Scanner;
class Main {

  public static void main(String args[]) {
Scanner sc=new Scanner(System.in);
for(;;) {
	String str=sc.next();
	if(str.equals("0"))break;
	char[] ch= str.toCharArray();
	int sum=0;
	for(int i=0;i<ch.length;i++) {
		int num=Character.getNumericValue(ch[i]);
		sum+=num;

	}
System.out.println(sum);
}
sc.close();
  }


}
