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 <cstdio>
using namespace std;

int main(){
  string str;
  int sum;
  while(getline(cin,str)){
    sum = 0;
    for(auto c : str){
      sum += c - '0';
    }
    if(sum) printf("%d\n",sum);
  }
  return 0;
}