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>
#include<string>

using namespace std;

int main(){
  string x;

  while(cin>>x,(x!="0")){
    int n=0;

    for(int i=0; i<(int)x.size(); i++){
      n+=(x[i]-'0');
    }
    cout <<n<<endl;
  }
  
  return 0;
}

