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>
using namespace std;

int main(){
	string st;
	int sum;

	while(getline(cin,st) && st != "0"){
		sum = 0;
		for(int i=0; i<st.length(); ++i){
			//cout << st[i];
			sum += st[i] - 48;
		}
		cout << sum << endl;
	}

	return 0;
}

