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()
{
  string num;
  while (cin >> num, num != "0"){
    int res = 0;
    for (int i = 0; i < num.size(); i++){
      res += (num[i] - '0');
    }
    
    cout << res << endl;
  }
}