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>
char data[1010];
void proc(){
  int sum=0;
  char*p=data;
  while(*p!=0){
    sum+=*p-'0';
    ++p;
  }
  printf("%d\n",sum);
}
int main(){
  while(true){
    gets(data);
    if(data[0]=='0')break;
    proc();
  }
  return 0;
}