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 a;
	while(cin >> a){
		if(a.compare("0") == 0)
			break;
		int sum = 0;
		for(int i = 0; i < a.length(); i++){
			sum += a[i] - 48;
		}
		cout << sum << endl;
	}
}
