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 s;
	while(1){
		int ss=0;
		cin>>s;
		for(int i=0;i<s.size();i++){
			ss+=(s[i]-'0');
			}
		if(ss==0)break;
		cout<<ss<<endl;;
	}
}

