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 c,t;
	scanf("%c", &c);
	while(c - 48){
		int temp = 0;
		while(c - 10){
			temp += (c - 48);
			scanf("%c", &c);
		}
		printf("%d\n", temp);
		scanf("%c", &c);
	}
}