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 <cstdio>

int main() {
  char x[1010];
  while (true) {
    scanf("%s", x);
    if (x[0] == '0') break;
    int sum = 0, i = 0;
    while (x[i]) {
      sum += x[i] - '0';
      i++;
    }
    printf("%d\n", sum);
  }
  
  return 0;
}
