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;

int main()
{
  char a;
  int sum;
  while((a=cin.get())!='0'){
    sum = (int)a-48;
    while((a=cin.get())!='\n'){
      sum += (int)(a)-48;
    }
    cout << sum << endl;
  }
  return 0;
}

