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 x;
  cin >> x;
  
  while (x != "0") {
  int sum = 0;
  for (int i=0; i<x.size(); i++) {
    sum += x.at(i) - '0';
  }
  cout << sum << endl;
  cin >> x;
  }
 

return 0;
}

