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