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>
#include<string.h>
int main(){
	char ang[1010];
	int sum;
	while(scanf("%s",ang) != EOF){
		if(strcmp(ang, "0")==0) break;
		for(int i=0; i<strlen(ang); i++){
			sum = sum + ang[i]-'0';
		}
		printf("%d\n",sum);
		sum=0;
	}
}
