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 x[1000];
  int i, sum;
  while(2){
    scanf("%s", x);
    if(x[0] == '0')break;
      sum = 0;//入れないと...?
    for(i = 0;x[i] != '\0';i++){
      sum += x[i] - '0';
    }
    printf("%d\n", sum);
  }
  return 0;
}

