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>
#include<cstring>

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

	return 0;
}

