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 num[1000];
	
	while (1){
		scanf("%s", num);
		if (num[0]==48) break;
		int sum=0;
		int i=0;
		while(num[i]){
			sum += num[i] -48;
			i++;
		} 
		printf("%d\n", sum);
	}
	return 0;
}