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 s;
	cin>>s;
	while(s!="0"){
		int sum=0;
		for(int i=0; i<s.length(); i++){
			sum+=s[i]-'0';
		}
		cout<<sum<<endl;
		cin>>s;
	}
}
