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<bits/stdc++.h>
using namespace std;
int main(){
  while(1){
      string a;
      cin >> a;
      if(a == "0") break;
      int x = 0;
      for(int i = 0; i< a.size(); i++){
          x += a[i] - '0';
      } 
      cout << x << endl;
  }
}
