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 S;
  while(cin>>S&&S.at(0)!='0'){
    int ans=0;
   for(int i=0;i<S.size();i++){
     ans+=S.at(i)-'0';}
  cout<<ans<<endl;}
  return 0;
}
