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<cstdio>
int main(){
char a[1001];
int i,sum;
while(1){
    sum = 0;
scanf("%s",a);
if(a[0] == '0'){
    break;
}
for(i = 0;a[i] != '\0';i++){
    sum = sum + a[i] - '0';
}
printf("%d\n",sum);
}
return 0;
}
