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 x[1001] = {};
	int sum, i;


	while (1) {
		sum = 0;

		scanf("%s", x);

		if (x[0] == '0') break;

		for (i = 0; x[i] != '\0'; i++) {
			sum += x[i] - '0';
		}

		printf("%d\n", sum);
	}
	

	return 0;
}

