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(void)
{
int i,sum=0;
int flag=0;

char x[1002];
scanf("%s",x);
do{
for(i=0;i<1002;i++){
if(x[i]==0){
  printf("%d\n",sum);
  break;
}else{
sum+=x[i]-0X30;
}
}
sum=0;
scanf("%s",x);
}while(x[0]!=0X30);

return 0;
}