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() {
	int i,sum;
	char a[1001];
	
	while(1){
		scanf("%s",a);
		if(a[0] == '0') break;
    
		sum = 0;
		for(i=0;a[i]!='\0';i++)
		sum += a[i] - '0';
		printf("%d\n", sum);
	}
	return 0;
}
