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() {
	char ch;
	int tmp;

	while (true) {
		ch = getchar();
		if (ch == '0') break;

		tmp = ch - '0';
		while ((ch = getchar()) != '\n'){
			tmp += (ch - '0');
        }
		printf("%d\n", tmp);

	}

	return 0;
}
