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.*;

class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
for(;;){
int ans =0;
String s=sc.nextLine();
if(s.equals("0"))break;
for(int i=0; i<s.length(); i++){
	ans += Character.digit(s.charAt(i),10);
}
System.out.println(ans);
	}
}
}