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 <bits/stdc++.h>

using namespace std;

int main()
{
	string a;
	
while(cin>>a )
{	
	int total=0;
	for(int i=0;i<a.size();i++)
	{
		total+=(a[i]-48);
	}
	if(total==0){break;}
	cout<<total<<endl;
}
	
	return 0;
}
