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 s[1100];

	while(true) {
		scanf("%s",s);
		if(s[0] == '0')
			break;
		int sum = 0;

		for(int i = 0;s[i] != '\0';i++) {
			sum += s[i] - '0';
		}
		printf("%d\n",sum);
	}
    return 0;
}
