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 <stdio.h>

int main(){
  char str[1024];
  while(1){
    scanf("%s", str);
    if(str[0] == '0') break;
    int sum = 0;
    for(int i = 0; str[i] != '\0'; i++){
      sum += str[i] - 48;
    }
    printf("%d\n", sum);
  }
}
