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;

string S;
int main(){
	while(1){
		cin >> S;
		if(S[0] == '0') break;
		long long ans = 0;
		for(int i=0;i<S.size();i++){
			ans += S[i] - '0';
		}
		cout << ans << endl;
	}
}
