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 str;
  cin >> str;
  while(str[0]!='0'){
    int i,o=0;
    for(i=0;i<str.size();i++){
      o+=str[i]-'0';
    }
    cout << o << endl;
    cin >> str;
  }
  return 0;
}