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>

char s[1024];

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

