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(){
	string x;
	while(cin>>x){
		int sum;
		if(x[0]!='0'){	
		int l=x.length();
		sum=0;
			for(int i=0; i<l; i++){
			sum+=x[i]-'0';
			}
		}
		else{
			break;
			}
		cout<<sum<<endl;
		}
	}

