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(){
int sum = 0;
string x;

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


