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;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
while(true){
String s = sc.next();
if(s.equals("0")){
break;
}
int sum = 0;
for (int i = 0;i < s.length(); i++){
sum = sum + s.charAt(i) - '0';
}
System.out.println(sum);
}
sc.close();
}
}
