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>
using namespace std;

int main() {
  string x;
  for (;;) {
    cin >> x;
    if (x == "0")
      return 0;
    int sum = 0;
    for (int i = 0; i < x.size(); ++i)
      sum += (x[i] - '0') % 10;
    cout << sum << endl;
  }
}
