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){
    if(num=="0")break;
    else{
      int sum=0;
      for(int i=0;i<num.length();i++){
        sum+=(num[i]-'0');
      }
      cout<<sum<<endl;
    }
  }
}
