#include <stdio.h>

int main(){
	char s[1100];
	while(1){
		scanf("%s",s);
		if(s[0] == '0'){
			break;
		}
		int sum = 0;
		for(int i=0;s[i] != '\0';i++){ //\0(空文字)に達するまで処理
			sum += s[i] -'0';	
		}
		printf("%d\n",sum);
	}
	return 0;
}


### Prompt

Construct a CPP code solution to the problem outlined:

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

### Response

```cpp
#include <stdio.h>

int main(){
	char s[1100];
	while(1){
		scanf("%s",s);
		if(s[0] == '0'){
			break;
		}
		int sum = 0;
		for(int i=0;s[i] != '\0';i++){ //\0(空文字)に達するまで処理
			sum += s[i] -'0';	
		}
		printf("%d\n",sum);
	}
	return 0;
}


```