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 <iostream>
#include <string>
using namespace std;

int main(){
	string num;
	while (1){
		int sum=0;
		cin >> num;
		if(num=="0") break;
		for(int i=0 ; i<num.size() ; i++){
			sum+=num[i]-0x30;
		}
		cout << sum << endl;
	}
}