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
#include <iostream>
#include <string>
using namespace std;

int main(){
 int sum;
 string x;

 while(1){
  cin >> x;
  if(x=="0")break;
  sum=0;
  for(int i=0;i<x.size();i++){
   sum+=x[i]-'0';
  }
  cout << sum << endl;
 }
 return 0;
}