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

	return 0;
}
