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(){
  int i;
  while(1){
    char str[1000];
    int s=0;
    scanf("%s\n",str);
    if(str[0]=='0') break;
    for(i=0;str[i]!='\0';i++){
      s+=str[i]-'0';
    }
    printf("%d\n",s);
  }
  return 0;
}
