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<bits/stdc++.h>
using namespace std;

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