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